| RHP667 | Plans of the controverted ground betwixt the lands of Clayock, Knockdee, and Stemster with the conterminous lands, Caithness | c 1770 |
| RHP667/1 | Plans of the controverted ground betwixt the lands of Clayock, Knockdee, and Stemster with the conterminous lands | c 1770 |
| RHP667/2 | Plans of the controverted ground betwixt the lands of Clayock, Knockdee, and Stemster with the conterminous lands | c 1770 |
| RHP667/3 | Plans of the controverted ground betwixt the lands of Clayock, Knockdee, and Stemster with the conterminous lands | c 1770 |
| RHP2215 | Chart of the coast of Scotland, including the coasts of the counties of Kincardine, Aberdeen and Banff | 1784-1785 |
| RHP3910/1 | Plan of the lands of Lynegar, Brabster and Watten, Caithness | mid 18th century |
| RHP3910/2 | Explanatory note to plan of the lands of Lynegar, Brabster and Watten, Caithness | mid 18th century |
| RHP8496 | Architectural drawing of Bower parish church, Caithness | 26 Jul 1845 |
| RHP8497 | Architectural drawing of Bower parish church, Caithness | 1845 |
| RHP8498 | Architectural drawing of Bower manse, Caithness | 1846 |
| RHP8499 | Architectural drawing of Bower parish church, Caithness | 4 May 1848 |
| RHP22348 | Sketch plan of ground in controversy between West Murza (Mursay), belonging to Bowermadden, and East Murza, belonging to Ratter, near to the Quoy Burn and Mill of Murza | Early 19th century |
| RHP22512 | Plan of proposed line of [Highland Railway] passing through Cleanie (Clenny) Moss | c 1871 |
| RHP22519 | Architectural plan and elevation of new byre for Tister farm. (Specification and estimate endorsed thereon). | Late 19th century |
| RHP43575 | Plan of division of Lynegar Commonty. | 1833 |
| RHP43678 | Ordnance Survey 6 inch plan marked to show proposed new holding on farm of Swarclett. | 1914 |
| RHP78983 | Ordnance Survey 6 inch plan (Caithness, sheet XII) marked to show farm boundaries | [1944-1955] |
| RHP78984 | Ordnance Survey 6 inch plan (Caithness, sheet XIII) marked to show farm boundaries | [1944-1955] |
| RHP78989 | Ordnance Survey 6 inch plan (Caithness, sheet XVIII) marked to show farm boundaries | [1944-1955] |
| RHP78990 | Ordnance Survey 6 inch plan (Caithness, sheet XIX) marked to show farm boundaries | [1944-1955] |
| RHP79526 | Ordnance Survey 6 inch plan (Caithness, sheet VII) marked to show farm boundaries: [1944 x 1954] | nd |
| RHP93980 | Plan and elevations of steelwork for renewal of bridge no. 347 at Bower Station (Highland Railway) | Dec 1918 |
| RHP93981 | Outline plan of renewal of bridge no. 347 between Bower and Georgemas (Highland Railway) | Dec 1918 |
| RHP129785 | Drawing showing elevation, plan and section of bridge over Laril Burn and road near Bower Station (Sutherland and Caithness Railway) | c 1871 |
| RHP131647 | Weight diagram showing elevation. plan and sections of bridge carrying Thurso Road, North of Georgemas (A882) over railway at 147 miles 76 chains between Georgemas and Bower Stations (London, Midland and Scottish Railway) | c 1933 |
| RHP131648 | Weight diagram showing elevation. plan and sections of bridge carrying Gillock Road, East of Bower over railway at 150 miles 20 chains between Bower and Watten Stations (London, Midland and Scottish Railway) | c 1933 |
| RHP141549 | Copy plan of Lyth estate, Caithness | 1771 |
| RHP142368 | Plans of proposed extension to Bower churchyard, Caithness | 1962 - c 1964 |
| RHP142368/1 | Bower churchyard, Caithnes: site plan | [1964] |
| RHP142368/2 | Bower churchyard, Caithnes: extension plan | Oct 1962 |
| RHP142368/3 | Bower churchyard, Caithnes: location plan | [1964] |
| RHP142370 | Plan of proposed extension to Bower cemetery, Caithness | [1965] |