| RHP228 | Plan of the commonties of the parish of Firth, Orkney | [1846] |
| RHP6092 | Photostat copy of plan of SavilL or Benziaroth, belonging to Sir Laurence Dundas of Kerse (Vignettes of cows, etc.) (1-2) | 1769 |
| RHP6093 | Photostat copy of plan of those parts of Firth, Grimbister and Hunscarth (Huntscart), that belong to Sir Laurence Dundas of Kerse (Vignettes of fishermen, farm animals and an owl.) (1-2) | [1769] |
| RHP22325 | Photostat copy of architectural plan and elevation of teacher's house and school proposed to be built at Firth [for the Free Church of Scotland] | 1845 |
| RHP22326 | Photostat copy of architectural ground plan of school and schoolhouse to be erected in Firth [for the Free Church of Scotland] | 1845 |
| RHP22327 | Photostat copies of architectural ground plan of the Free [Church] school of Firth | 1845 |
| RHP22328 | Photostat copies of architectural elevation and floor plans (4) of a house in [?Firth] (Originals stitched together) | 1830 |
| RHP34167 | Admiralty chart of approaches to Kirkwall. | 1905 |
| RHP77334 | Ordnance Survey 6 inch plan (Orkney, sheet CVIII.NW) coloured and marked to show types of farming and farm boundaries | [1944-1954] |
| RHP79575 | Ordnance Survey 6 inch plan (Orkney, sheet CII) coloured and marked to show types of farming farm boundaries: [1944 x 1954] | nd |
| RHP95895 | Ordnance Survey 6 inch plan (Orkney, sheet CVIII.NW) coloured and marked to show classification of land | [1944-1955] |
| RHP97637 | Ordnance Survey 6 inch plan (Orkney, Sheet XCV) marked to show classification of land | [1944-1954] |
| RHP97643 | Ordnance Survey 6 inch plan (Orkney, sheet CI) marked to show classification of land | [1944-1954] |
| RHP97644 | Ordnance Survey 6 inch plan (Orkney, sheet CII) marked to show classification of land | [1944-1954] |
| RHP97645 | Ordnance Survey 6 inch plan (Orkney, sheet CII) coloured and marked to show classification of land | [1944-1954] |
| RHP97649 | Ordnance Survey 6 inch plan (Orkney, sheet CVII) marked to show classification of land | [1944-1954] |