| RHP159/1 | Chart of the Cromarty Firth from Invergordon to Cromarty, Ross and Cromarty | 12 Feb 1851 |
| RHP1456 | Plan of the estate of Braelangwell, Resolis, Ross and Cromarty | 1844 |
| RHP1469 | Plan of the lands of Drumcudden, property of Captain Hugh Robert Duff of Muirton | 1796 |
| RHP1472 | Rough sketch of the farm of Kirkton, Resolis, Ross and Cromarty | 1842 |
| RHP3513 | Plan of the estate and barony of Findon the property of Sir Roderick Mackenzie of Scatwell. | 1769 |
| RHP3549 | Plan of the lands of Findon, Ross and Cromarty | 1837 |
| RHP3680 | Plan of the estate of Findon, reduced in 1853. | 1849 |
| RHP11750 | Section of Ordnance Survey 6 inch plan marked to show proposed routes of the Dingwall and Cromarty Light Railway. | 20 Jun 1898 |
| RHP17882 | Bound plans and sections for Cromarty and Dingwall Light Railway | Nov 1896 |
| RHP18087 | Bound plans and sections of the Cromarty and Dingwall Light Railway, including deviation of said railway at Jemimaville. | 1896, 1899, 1906. |
| RHP18088 | Bound plan and section of deviation at Jemimaville of the Cromarty and Dingwall Light Railway. | 1906 |
| RHP41039 | Plan ('rough tracing') of Kirkton (Kirktown), Balblair, Chapelton (Chapeltown), Auchmartin (Achmartin) and Gordonsmills referred to in deposition of John Fraser in causa Graham v. Disher | 23 February 1852 |
| RHP78859 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXV.SE) marked to show farm boundaries | [1944-1955] |
| RHP78862 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXV.SE) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79286 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXVI) coloured and marked to show types of farming and farm boundaries | [1944-1955] |
| RHP79293 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXXVII) marked to show farm boundaries | [1944-1955] |
| RHP79294 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXXVIII) marked to show farm boundaries | [1944-1955] |
| RHP83545 | Plan of ground along line of march between estates of Braelangwell and Poyntzfield from Old Porter's Lodge to Braelangwell, presently possesed by Mr McGregor | 1851 |
| RHP97513 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXV.SE) marked to show classification of land | [1944-1954] |
| RHP97681 | Ordnance Survey 6 inch plan (Ross and Cromarty, sheet LXVI) marked to show classification of land | [1944-1954] |
| RHP143400/8/17 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 65 NW | 1960s-1970s |
| RHP143400/8/18 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 65 NE | 1960s-1970s |
| RHP143400/8/20 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 66 NW | 1960s-1970s |
| RHP143400/8/21 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 66 NE | 1960s-1970s |
| RHP143400/8/22 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 66 SE | 1960s-1970s |
| RHP143400/8/23 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 66 SW | 1960s-1970s |
| RHP143400/8/26 | Ordnance Survey 6 inch plan, Ross and Cromarty, Sheet NH 76 SW | 1960s-1970s |