| RHP979 | Plan of the Mornish estate, Argyll | 1866 |
| RHP2765 | Plan of pier at Salen, Isle of Mull, Argyll | 5 Dec 1862 |
| RHP3273 | Plan of the estate of Jarvisfield in the island of Mull, the property of Lachlan MacQuarrie, Argyll | 1826 |
| RHP3354 | Plan of the estate of Tenga, Kilninian and Kilmore, Argyll | [c 1880] |
| RHP7648 | Architectural drawing of Dervaig church, Argyll | 5 Dec 1903 |
| RHP7649 | Architectural drawing of Dervaig church, Argyll | [Early 20th century] |
| RHP7650 | Plan of drainage of Dervaig manse, Argyll | [Late 19th century] |
| RHP12781 | Architectural plan of house to be erected on the farm of Ensay: 1835. | 1835 |
| RHP12783 | Plan of the farm of Ensay and hill of Calgary: 1837. | 1837 |
| RHP13168 | Sketch plan of Tobermory, showing piers: 1891. | 1891 |
| RHP22211 | Ordnance Survey plans marked to show Tobermary Burgh Electricity Scheme, Argyll | 1925 |
| RHP30877 | Volume containing 8 architectural plans, sections, elevations and site plans of Tobermory Union Poorhouse. | 1862 |
| RHP34122 | Admiralty chart of north-west coast of Mull, Sound of Mull and Loch Sunart, Argyll | 1876 |
| RHP35115 | Architectural plans, elevations and half-section of Ulva House | 1946 |
| RHP35122 | Architectural plans and elevations of Ardaluin [Ardalum?] Lodge | 1946 |
| RHP35990 | Plan of the estate of Morinish, including the Treshnish Islands and part of Torloisk Estate. (Vignette of [Calgary?] Castle) | 1866 |
| RHP40989 | Plan of lands of Crannich (Cranich), Tenga (Tengue) and Ledmore. | 27 June 1852 |
| RHP44713 | Plan of Mornish (Morinish) estate, including Treshnish Islands. (Vignette of pictorial view of Calgary Castle) | 1866 |
| RHP44714 | 1. Plan of Mornish (Morinish) estate, including Treshnish Island, marked to show acreages. (Vignette of pictorial view of Calgary Castle) (Damaged) 2. Copy of letter from George Mackay of Bighouse, owner of the estate, concerning no.1. | 1866 |
| RHP44715 | Plan of Mornish (Morinish) estate, including Treshnish Islands, marked variously, including let of fishing. (Vignette of pictorial view of Calgary Castle) | 1866 |
| RHP44726 | Architectural plan and elevation of schoolhouse [at Calgary?]. | 1864 |
| RHP44727 | Architectural plan and elevation of farm offices at Treshnish. | 1867 |
| RHP44728 | Architectural plan, elevation and section of farm offices [at Treshnish]. | 1870 |
| RHP44729 | Architectural site plan of Treshnish farm. | 1874 |
| RHP44730 | Architectural plan of ground floor of Treshnish farm house. | 1874 |
| RHP44731 | Architectural plan of first floor of Treshnish farm house. | 1874 |
| RHP44732 | Architectural plan of roof of Treshnish farm house. | 1874 |
| RHP44733 | Architectural section and elevation of Treshnish farm house. | 1874 |
| RHP44734 | Architectural elevation of Treshnish farm house. | 1874 |
| RHP44735 | Architectural plan, elevation and section of piggery, dairy and larder at Treshnish farm. | 1874 |
| RHP44736 | Architectural plan, elevation and section of Treshnish farm offices. | 1874 |
| RHP76312 | Ordnance Survey 6 inch plan (Argyllshire, sheet LIII.NW) marked to show farm boundaries | [1944-1954] |
| RHP76314 | Ordnance Survey 6 inch plan (Argyllshire, sheet LIII.SW) marked to show farm boundaries | [1944-1954] |
| RHP76315 | Ordnance Survey 6 inch plan (Argyllshire, sheet LIII.SE) marked to show farm boundaries | [1944-1954] |
| RHP76462 | Ordnance Survey 6 inch plan (Argyllshire, sheet XXXIX.SW) marked to show farm boundaries | [1944-1945] |
| RHP82922 | Ordnance Survey 6 inch plan marked to show proposed new holdings and common grazing on farms of Oskamull and Achronich, Mull | 1914 |
| RHP86142 | Plan of estate of Jarvisfield | 1826 |
| RHP92597 | Feuing plans of part of Mishnish Estate, Argyll | 1891 |
| RHP92598 | Part of Ordnance Survey 6 inch plan (Argyllshire, sheet XXXVIII) | [c 1900] |
| RHP92674 | Photocopy of plan of the controverted ground between the farm of Kilbrenan and Ballygown (Balligoun), Torloisk's property, and Lagganulva, of which two thirds belongs to Boisdale and one third to Torloisk, with table of contents | Aug 1790 |
| RHP94107 | Architectural site and block plans of proposed holiday home estate at Strongarbh, Tobermory for S B Allison & Co Ltd | [1966] |
| RHP94108 | Architectural plans, elevations and section of proposed holiday home estate at Strongarbh, Tobermory, for S B Allison & Co Ltd | [1966] |
| RHP97534 | Ordnance Survey 6 inch plan (Argyll, sheet XXXVIII) coloured to show classification of land | [1944-1954] |
| RHP97535 | Ordnance Survey 6 inch plan (Argyll, sheet LXIX) coloured and marked to show classification of land | [1944-1954] |
| RHP140927 | Plan of [Torloisk estate, Isle of Mull] | c 1852 |
| RHP140929 | Plan of Kilbrenan farm, Isle of Mull | 1790 |
| RHP140930 | Plan of farms of Crossapol, Langamull and Kildavee, Isle of Mull | c 1790 |
| RHP140931 | Plan of Torloisk estate, Isle of Mull | 1851 |
| RHP140932 | Plan of part of Torloisk estate, Isle of Mull | 1852 |
| RHP141401 | Plan of farms of Crossapol, Langamull and Kildavee, Isle of Mull | 1789 |
| RHP141403 | Plan of Fanmore and Ballygown crofts, Torloisk estate, Argyll | 1851 |