| RHP3553 | Plan of Newton Don, Nenthorn, Berwickshire | 1777 |
| RHP3600/1 | Plan of lands of Harrietfield, Nenthorn, Berwickshire | [early 19th century] |
| RHP3600/3 | Plan of Courthill, Nenthorn, Berwickshire | 1816 |
| RHP3600/4 | Note of measurement of farms of Courthill and Smailholm Spittal | 4 Dec 1810 |
| RHP3600/5 | List of plans relating to the Newton Don estate | 23 Nov 1827 |
| RHP6687 | Copy of plan of the estate of Nenthorn, Berwickshire | 1789 |
| RHP9354 | Plan of Newton Don Estate, Berwickshire | 1846 |
| RHP9355 | Plan of Newton Don Park, Harrietfield and Newtonlees, Berwickshire | [19th century] |
| RHP9356 | Plan of Newton Don Park, Berwickshire | 1833 |
| RHP9357 | Plan of Newton Don Park, Harrietfield, Courthill and Smailholm Spittal | [19th century] |
| RHP9358 | Table of acreages of Newton Don Park, Smailholm Spittal, Edenmouth and adjacent farms | [mid 19th century] |
| RHP49562 | Plan of estate of Newtondon, with table of contents | 1828 |
| RHP49715 | Ordnance Survey 6 inch plan marked to show various farms in Mellarstain district | 1908 |
| RHP49752 | Copy Ordnance Survey 6 inch of Mellerstain Estate and surrounding farms | [mid 20th century] |
| RHP49754 | Ordnance Survey 6 inch plan marked to show woodland in vicinity of Mellerstain House referred to in agreement between Forrestry Commission and Earl of Haddington | December 1953 |
| RHP77203 | Ordnance Survey 6 inch plan (Berwickshire, sheet XXVII.SE; Roxburghshire, part of sheet V) coloured and marked to show types of farming and farm boundaries | [1941-1943] |
| RHP77205 | Ordnance Survey 6 inch plan (Berwickshire, sheet XXVII.SW; Roxburghshire, parts of sheets IV & V) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77215 | Ordnance Survey 6 inch plan (Berwickshire, sheet XXXI.NW; Roxburghshire, sheets IV, V, VIII & IX) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP77216 | Ordnance Survey 6 inch plan (Berwickshire, sheet XXXI.NE; Roxburghshire, parts of sheets V & IX) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP79451 | Ordnance Survey 6 inch plan (Roxburghshire, sheet VI & VIA; Berwickshire, parts of sheets XXVII, XXVIII & XXXI; Northumberland, part of sheet IX) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP89954 | Photocopy of plan of estate of Newtondon, incorporating enlarged plan of Newtondon Park, with table of contents | 1828 |
| RHP94300/6 | Photocopy plan of lands of Muirdean, with table of contents | [c 1840] |
| RHP97685 | Ordnance Survey 6 inch plan (Roxburghshire, sheets VI & VIA; Berwickshire, parts of sheets XXVII, XXVIII & XXXI; Northumberland, part of sheet IX) coloured and marked to show classification of land | [1944-1954] |
| RHP141294 | Architectural drawings of Newton Don House, Kelso | Mar 1909 |
| RHP141294/1 | Newton Don House, Kelso: Upper floor plan | Mar 1909 |
| RHP141294/2 | Newton Don House, Kelso: Upper floor plan | Mar 1909 |
| RHP141294/3 | Newton Don House, Kelso: First floor plan | Mar 1909 |
| RHP141294/4 | Newton Don House, Kelso: Ground floor plan | Mar 1909 |
| RHP141294/5 | Newton Don House, Kelso: Basement floor plan | Mar 1909 |
| RHP141473 | Plan of Nenthorn new burial ground | 2 Feb 1934 |