| RHP10000/AR12 | Plan of the coal and mines of coal under the lands of Burnbank | 1938 |
| RHP10000/AR51 | Plan of the coal and mines of coal under the lands of Farm of Glaister | 1938 |
| RHP10000/AR53 | Plan of the coal and mines of coal under the lands and Farm of Loudoun Mains | 1938 |
| RHP10000/AR54 | Plan of the coal and mines of coal under the lands and Farm of Cronan | 1938 |
| RHP10000/AR55 | Plan of the coal and mines of coal under the lands and Farm of New Intax | 1938 |
| RHP10000/AR74 | Plan of the coal and mines of coal under the lands and Farm of Hill and Over Polbaith | 1938 |
| RHP10000/AR75 | Plan of the coal and mines of coal under the lands and farm of Nether Newton | 1935 |
| RHP10000/AR76 | Plan of the coal and mines of coal under the lands and farm of Whatriggs | 1938 |
| RHP10000/AR77 | Plan of the coal and mines of coal under the lands and farm of Alton Muirhouse | 1938 |
| RHP10000/AR78 | Plan of the coal and mines of coal under the lands and farm of Gamesland | 1938 |
| RHP10000/AR79 | Plan of the coal and mines of coal under the lands and farm of Knevocklaw | 1938 |
| RHP10000/AR80 | Plan of the coal and mines of coal under the lands and farm of Dyke | 1938 |
| RHP10000/AR81 | Plans of the coal and mines of coal under the lands and farm of Meikle Glen and High Carlincraig | 1938 |
| RHP10000/AR81/1 | Plan of the coal and mines of coal under the lands and farm of Meikle Glen and High Carlincraig | 1938 |
| RHP10000/AR81/2 | Plan of the coal and mines of coal under the lands and farm of Meikle Glen and High Carlincraig | 1938 |
| RHP10000/AR82/1 | Plan of the coal and mines of coal under the lands and farm of Meikle Glen and High Carlincraig | 1938 |
| RHP10000/AR82/2 | Plan of the coal and mines of coal under the lands and farm of Meikle Glen and High Carlincraig | 1938 |
| RHP10000/AR88 | Plan of the coal and mines of coal under the lands known as Bankhead Mill | 1938 |
| RHP10000/AR89 | Plan of the coal and mines of coal under the lands and farm of Low Bowhill | 1938 |
| RHP10000/AR92 | Plan of the coal and mines of coal under land in the Parish of Loudoun, Ayrshire | 5 Feb 1938 |
| RHP10000/AR135 | Plans of the coal and mines of coal under the manse and glebe grounds of Loudoun, Ayrshire | 1938 |
| RHP10000/AR135/1 | Plan of the coal and mines of coal under the manse grounds of Loudoun, Ayrshire | 1938 |
| RHP10000/AR135/2 | Plan of the coal and mines of coal under the glebe grounds of Loudoun, Ayrshire | 1938 |
| RHP10000/AR144 | Plan of the coal and mines of coal under the lands and Farm of West Newton | 1938 |
| RHP10000/AR145 | Plan of the coal and mines of coal under the lands and farm of West Heads | 1938 |
| RHP10000/AR164 | Plan of the coal and mines of coal under the lands and farm of Dalwhatswood | 1938 |
| RHP10000/AR195 | Plan of the coal and mines of coal under lands of Ladyton | 1938 |
| RHP10000/AR242 | Plan of the coal and mines of coal under the lands and farm of East Newton | 1938 |
| RHP10000/LK25 | Plan of all the coal and mines of coal under (1) the lands and farm of Drumclog (including Mid Drumclog) and (2) the former Estate of Stobieside | 1938 |
| RHP120358A | Tracing showing elevation, plan and sections of steelwork for bridge over Mill Road, Newmilns (Glasgow & South Western Railway) | 1893 |
| RHP120358B | Tracing showing elevation, plan and section of masonry for bridge under public road at Darvel (Glasgow & South Western Railway) | 1893 |
| RHP120516-120517 | Coloured tracing showing plan of additional ground required for accommodation works on property of Wm Smith together with tracing showing details of cast iron work for accommodation bridge at Newmilns (Glasgow & South Western Railway) | 1894 |
| RHP120999-121000 | Hand coloured drawings showing elevations, plans, sections and details of masonry and steelwork for bridge over road near Peg 32 in Darvel. (Glasgow & South Western Railway) | 1891 |
| RHP121001-121002 | Hand coloured drawings showing elevations, plans, sections and details of masonry and steelwork, as amended for bridge over road at Darvel Station. (Glasgow & South Western Railway) | 1894 |
| RHP121009-121010 | Hand coloured drawings showing elevations, plans, sections and details of masonry and steelwork for accommodation bridge near Peg No 28 in Darvel. (Glasgow & South Western Railway) | 1895 |
| RHP14302 | Plan of burying ground at Loudoun Kirk, Ayrshire | 1881 |
| RHP15540 | Bound plans and sections of GLASGOW AND SOUTH WESTERN RAILWAY works, a line from NEWMILNS to DARVEL, at PAISLEY, at ST. ENOCH STATION and at AUCHINLECK: 1890 | 1890 |
| RHP16350 | Bound plans and sections of the Glasgow and South Western Railway works, a line from Newmilns to Darvel, at Paisley, at St Enoch Station and at Auchinleck. | 1890 |
| RHP16803 | Plan of Darvel Station (Caledonian Railway). | 1897 |
| RHP18225 | Plan of the Caledonian Railway from Darvel Station to beyond Allanton. | 1897 |
| RHP34681 | Architectural drawing of memorial to Alexander Morton at Darvel, Ayrshire | 1925 |
| RHP34682 | Elevation of memorial [Alexander Morton at Darvel, Ayrshire] | 1926 |
| RHP34683 | Plan of lands of Hillhead and West Gowanbank, Loudon, Ayrshire | 1926 |
| RHP34684 | Plan of site of house at [Hillhead] near Darvel, Loudon, Ayrshire | 1926 |
| RHP34850/1-6 | 1. Plan and section of proposed alterations between Newmilns and Darvel to the road from Kilmarnock by Hurleford Bridge to Lanarkshire. 2. Book of reference 3. Standing Orders 4-6. Duplicates | 1846 |
| RHP34851/1-6 | 1. Plan and section of a proposed alteration between Glaston and Newmilns of the road from Kilmarnock by Hurleford Bridge to Lanarkshire. 2. Book of reference 3. Standing Orders 4-6. Duplicates | 1846 |
| RHP34915/1-6 | Plans of the Caledonian Railway (Stonehouse and Galston branches) | 1865 |
| RHP34933/1-3 | 1. Bound plans and sections of the Avondale and Douglas Railway, showing the line from near Newmilns to near Douglas, (with marked Ordnance Survey 1 inch map).
2. Gazette notice and book of reference
3. Duplicate of 1 | 1895 |
| RHP34985/1-4 | 1. Bound plans and sections of the Glasgow and South-Western Railway's additional powers, including a line from Newmilns to Darvel and land to be acquired at Auchinleck, with marked Ordnance Survey 1 inch map.
2. Book of reference thereto
3-4. Duplicates | 1890 |
| RHP38311/36 | L.M.S. Railway, Northern Section: Gradient profiles, stations etc. | 1932 |
| RHP40063 | 1. Bound plans and sections of the Stonehouse and Galston branches of the Caledonian Railway. 2. Book of reference 3. Gazette notice 4-6. Duplicates of nos. 1-3 | 1865 |
| RHP49023 | Plan of farm of Burton, Loudon, Ayrshire | [late 19th century] |
| RHP75725 | Ordnance Survey 6 inch plan (Ayrshire, sheet XIV.SE) marked to show farm boundaries | [1944-1955] |
| RHP75742 | Ordnance Survey 6 inch plan (Ayrshire, sheet XVIII.NE) marked to show farm boundaries | [1944-1955] |
| RHP75743 | Ordnance Survey 6 inch plan (Ayrshire, sheet XVIII.NE) marked to show farm boundaries | [1944-1955] |
| RHP75744 | Ordnance Survey 6 inch plan (Ayrshire, sheet XVIII.SE) marked to show farm boundaries | [1944-1955] |
| RHP75745 | Ordnance Survey 6 inch plan (Ayrshire, sheet XVIII.SE) marked to show farm boundaries | [1944-1955] |
| RHP75748 | Ordnance Survey 6 inch plan (Ayrshire, sheet XIX.NE) marked to show farm boundaries | [1944-1955] |
| RHP75749 | Ordnance Survey 6 inch plan (Ayrshire, sheet XIX.SW) marked to show farm boundaries | [1944-1955] |
| RHP75750 | Ordnance Survey 6 inch plan (Ayrshire, sheet XIX.SE) marked to show farm boundaries | [1944-1955] |
| RHP75751 | Ordnance Survey 6 inch plan (Ayrshire, sheet XIX.NW) marked to show farm boundaries | [1944-1955] |
| RHP75752 | Ordnance Survey 6 inch plan (Ayrshire, sheet XX.NW) marked to show farm boundary | [1944-1955] |
| RHP75753 | Ordnance Survey 6 inch plan (Ayrshire, sheet XX.SW) marked to show farm boundaries | [1944-1955] |
| RHP76642 | Ordnance Survey 6 inch plan (Lanarkshire, sheet XXIX.SE; Ayrshire, parts of sheets XIX & XX) marked to show farm boundaries | [1944-1945] |
| RHP76739 | Ordnance Survey 6 inch plan (Lanarkshire, sheet XXIX.SE; Ayrshire, parts of sheets XIX & XX) marked to show farm boundaries | [1944-1945] |
| RHP78908 | Ordnance Survey 6 inch plan (Renfrewshire, sheet XIX.SW; Ayrshire, part of sheet XIV) marked to show farm boundaries | [1944-1955] |
| RHP78913 | Ordnance Survey 6 inch plan (Renfrewshire, sheet XX.NW; Ayrshire, parts of sheets XIV & XIX) marked to show farm boundaries | [1944-1955] |
| RHP78914 | Ordnance Survey 6 inch plan (Renfrewshire, sheet XX.NE; Ayrshire, parts of sheets XIV, XIX & XX; Lanarkshire, parts of sheets XIV, XIX & XX) marked to show farm boundaries | [1944-1955] |
| RHP81921 | Plan of 2 foot roads leading from lands of Burflatt (Burflat) to Newmilns, grounds through which they pass, and great roads adjoining | Nov 1797 |
| RHP87953 | Plan of railway no.1 between Newmilns Station and Darvel Station (Glasgow and South Western Railway) | Jun 1896 |
| RHP89717 | 1. Plan and section of proposed alterations of part of road from Kilmarnock by Hurlford Bridge to county march with Lanarkshire and between bridge at Townhead of Newmilns and west end of village of Darvel
2. Book of reference
3. Standing orders
4-6. Duplicates of nos.1-3 | 28 Oct 1846 |
| RHP89719 | 1. Plan and section of proposed alteration of part of road from Kilmarnock by Hurlford Bridge to county march with Lanarkshire between villages of Galston and Newmilns
2. Book of reference
3. Standing orders
4-6. Duplicates of nos.1-3 | 13 Nov 1846 |
| RHP89796 | 1. Bound plans and sections of line from Stonehouse branch of Caledonian Railway to Galston, with branch to Glasgow and South Western Railway's Newmilns branch (book of reference and Gazette notice bound in)
2. Duplicate of no.1 | Nov 1865 |
| RHP89822 | 1. Bound plans and sections of Glasgow and South Western Railway Additional Powers, works including line from Newmilns to Darvel and acquisition of land at Newmilns and Auchinleck (book of reference, with Gazette notice bound in, attached)
2. Duplicate of no. 1 | Nov 1890 |
| RHP93257-93262 | Photocopies of series of architectural plans, elevations and sections of Lady Flora's School, Main Street, Newmilns as existing | Apr-May 1991 |
| RHP95238 | 1. Bound plans and sections of proposed Stonehouse Branch and Galston Branch of Caledonian Railway (Ordnance Survey 6 inch plan and book of reference, with Gazette notice bound in, attached): November 1865
2. Duplicate of no.1 (lacks Ordnance Survey 6 inch plan) | Nov 1865 |
| RHP96428 | Ordnance Survey 6 inch plan (Ayrshire, sheet XIV.SE) coloured to show classification of land | [1944-1955] |
| RHP96433 | Ordnance Survey 6 inch plan (Ayrshire, sheet XVIII.NE) coloured to show classification of land | [1944-1955] |
| RHP96435 | Ordnance Survey 6 inch plan (Ayrshire, sheet XVIII.SE) coloured to show classification of land | [1944-1955] |
| RHP96436 | Ordnance Survey 6 inch plan (Ayrshire, sheet XIX.NW) coloured and marked to show classification of land | [1944-1955] |
| RHP96437 | Ordnance Survey 6 inch plan (Ayrshire, sheet XIX.NE) coloured and marked to show classification of land | [1944-1955] |
| RHP96438 | Ordnance Survey 6 inch plan (Ayrshire, sheet XIX.SW) coloured to show classification of land | [1944-1955] |
| RHP96439 | Ordnance Survey 6 inch plan (Ayrshire, sheet XIX.SE) coloured to show classification of land | [1944-1955] |
| RHP96440 | Ordnance Survey 6 inch plan (Ayrshire, sheet XX.NW) coloured to show classification of land | [1944-1955] |
| RHP96441 | Ordnance Survey 6 inch plan (Ayrshire, sheet XX.SW; Lanarkshire, parts of sheets XXIX, XXX, XXXV & XXXVI) coloured to show classification of land | [1944-1955] |
| RHP97093 | Ordnance Survey 6 inch plan (Lanarkshire, sheet XXIX.NE; Ayrshire, parts of sheets XIV, XIX & XX) coloured to show classification of land | [1944-1954] |
| RHP97094 | Ordnance Survey 6 inch plan (Lanarkshire, sheet XXIX.SE; Ayrshire, parts of sheets XIX & XX) coloured to show classification of land | [1944-1954] |
| RHP97095 | Ordnance Survey 6 inch plan (Lanarkshire, parts of sheets XXIX, XXX, XXXV & XXXVI; Ayrshire, sheet XX.SW) coloured and marked to show classification of land | [1944-1954] |
| RHP120356 | Hand coloured drawing showing amended details for parapet rail of viaduct at Newmilns: (Glasgow & South Western Railway) | 1894 |
| RHP120357 | Hand coloured drawing showing elevation, plan and sections of masonry work for bridge over Mill Road, Newmilns (Glasgow & South Western Railway) | 1893 |
| RHP120359 | Hand coloured tracing showing elevation plan and sections of steelwork for bridge under public road at Darvel. (Glasgow & South Western Railway) | 1893 |
| RHP120360 | Hand coloured drawing showing elevation, plan and sections of masonry work for bridge over public road at Darvel. (Glasgow and South Western Railway) | 1893 |
| RHP120361 | Hand coloured tracing showing elevation plan and sections of bridge under railway near Darvel. (Caledonian Railway) | 1896 |
| RHP120497 | Hand coloured tracing showing elevation, plan and details of footbridge at Darvel Station. (Glasgow & South Western Railway): 1904 annotated with signatures to the quotation by the builders. 13 April 1904 | 1904 |
| RHP121003 | Hand coloured drawing showing elevations, plans and sections of masonry work for occupation archea bridges under and over the railway on Darvel Branch. (Glasgow & South Western Railway) | 1893 |
| RHP121004 | Hand coloured drawing showing elevations, plans and sections of masonry work for occupation girder bridges under and over the railway on Darvel Branch. (Glasgow & South Western Railway) | 1893 |
| RHP121011 | Hand coloured drawing showing section and detail of Sheet Piling and Retaining Wall in cutting between Peg No 25 and Peg No 29 at Darvel. (Glasgow & South Western Railway) | 1894 |
| RHP121012 | Hand coloured drawing showing diversion of public road near Peg No 25 in Darvel. (Glasgow & South Western Railway) | 1894 |
| RHP121013 | Hand coloured drawing showing plan of cattle pens to be erected at Darvel. (Glasgow & South Western Railway) | 1896 |
| RHP121014 | Hand coloured drawing showing cross sections and system of shoring large retaining wall on Darvel Branch. (Glasgow & South Western Railway) | 1895 |
| RHP121015 | Drawing showing elevation and plan of large retaining wall on Darvel Branch. (Glasgow & South Western Railway) | 1895 |
| RHP121016 | Hand coloured drawing showing elevation, plan and section of masonry work for accommodation bridge over railway near Peg No 23 on Darvel Branch. (Glasgow & South Western Railway) | 1894 |
| RHP121019 | Hand coloured tracing showing Station Arrangements at Darvel. (Glasgow & South Western Railway) | 1893 |
| RHP121020 | Hand coloured tracing showing elevation, plan, sections and details of Loudounhill Viaduct on Darvel to Strathaven Railway. (Caledonian Railway) | 1896 |
| RHP121021 | Hand coloured tracing showing elevation, plan, section and details of bridge over railway at 17 miles 12 chains between Loudounhill and Darvel. (Caledonian Railway) | 1896 |
| RHP121022 | Hand coloured tracing showing elevation, plan, section and details of bridge under railway at 17 miles 61½ chains on Strathaven-Darvel Line [near Darvel] (Caledonian Railway) | 1896 |
| RHP121388 | Hand coloured drawing showing elevation, plan and section of masonry work for Bridge No 22 between Newmilns and Darvel (Glasgow & South Western Railway) | 1893 |
| RHP121389 | Hand coloured drawing showing elevation, plan, and sections of steelwork for bridge No 27 near Darvel Station. (Glasgow & South Western Railway) | 1893 |
| RHP121390 | Hand coloured drawing showing details of steelwork for widening of bridge No 27 at Darvel Station. (Glasgow & South Western Railway) 1901 annotated with the signature to the builder's offer 21 January 1901 | 1901 |
| RHP121920 | Drawing showing elevation, plan and sections of bridge over railway at 14 miles 42 ½ chains on Blackwood to Darrel Railway between County Boundary and Darrel. (Caledonian Railway) | 1896 |
| RHP121921 | Hand coloured drawing showing plan at Darrel on Blackwood to Darrel Railway between County Boundary to Darrel. (Caledonian Railway) | 1896 |
| RHP127342 | Coloured drawing showing plan and section of Loudonhill Viaduct from Imile 50 chains to Imile 63chains between Strathaven and Darvel (Caledonian Railway) | 1898 |
| RHP127343 | Hand coloured drawing showing elevations, plan and sections of bridge under railway at 3miles 49 chains between County Boundary and Darvel. (Caledonian Railway) | 1898 |
| RHP127344 | Hand coloured contract drawing showing elevation, plan and sections of bridge under railway at 3miles 49chains between County Boundary and Darvel. (Caledonian Railway): 1897 annotated with the signatories to the contract. March 1898 | 1897-1898 |
| RHP127345 | Drawing showing elevation plan and sections of viaduct over Glen Water near Darvel at 3miles 70 chains between County Boundary and Darvel. (Caledonian Railway) | 1898 |
| RHP127346 | Hand coloured drawing showing details of steelwork for bridge at 1mile 71chains between County Boundary and Darvel. (Caledonian Railway) | 1898 |
| RHP127347 | Hand coloured drawing showing elevation, plan and sections of bridge over railway at 3miles 28chains between County Boundary and Darvel (Caledonian Railway) | 1898 |
| RHP127348 | Hand coloured drawing showing elevations, plan and sections of bridge under railway at 3miles 77chains between County Boundary and Darvel (Caledonian Railway) | 1899 |
| RHP127457 | Hand coloured drawing showing elevation, plan and sections of bridge at 0 miles 57 chains near Darvel (Caledonian Railway) | c 1923 |
| RHP131132 | Tinted tracing showing elevations, plan and sections of masonry and steelwork for bridge No 3 over Private Road between Newmilns and Darvel (Glasgow and South Western Railway) | 21 Apr 1896 |
| RHP131133 | Tracing showing elevation, plan and sections for masonry and cast iron work of bridge [No 5] over railway near Darvel (Glasgow and South Western Railway) | 21 Apr 1896 |
| RHP131491 | Weight diagram showing elevation, plan and sections of bridge carrying Yondercroft Road over railway west of Loudounhill Station (London, Midland and Scottish Railway) | c 1933 |
| RHP131492 | Weight diagram showing elevation, plan and sections of bridge carrying public road over railway east of Loudounhill Station (London, Midland and Scottish Railway) | c 1933 |
| RHP135086 | Hand tinctured plan showing elevation, plan and section of bridge over road junction (Near Newlands). (Caledonian Railway) (Glasgow and South Western Railway, Darvel & Strathavon Branch) | 19/08/1897 |
| RHP135087 | Hand tinctured plan showing elevation, plan and section of bridge over road (Near West Glaister). (Caledonian Railway) (Glasgow and South Western Railway, Darvel & Strathavon Branch) | 09/05/1958 |
| RHP135088 | Hand tinctured plan showing elevation, plan and sections of bridge over Glen Water, Darvel. (Caledonian Railway) (Glasgow and South Western Railway, Darvel & Strathavon Branch) | 19/08/1897 |
| RHP135089 | Hand tinctured plan showing elevation, plan and sections of bridge over road (west of Glen Water, Darvel). (Caledonian Railway) (Glasgow and South Western Railway, Darvel & Strathavon Branch) | 19/08/1897 |
| RHP140462 | Plans of Clearmount estate, Newmilns | 1968-1969 |
| RHP140462/1 | Block and location plans | 1968-1969 |
| RHP140462/2 | Feuing plan | 20 Mar 1969 |
| RHP143313 | Plan of Strathaven and Darvel Line proposed closing | 1949 |