| NAS National Archives of Scotland | Various accounts: imprests | E418/13; E342/9 | E418/13: 1-2. 1758, Aug 5-7 & 1758-1760: Receipts by John Douglas, architect in Edinburgh and James McPherson, mason in Dean, for payments under contract with Andrew Stuart, writer in Edinburgh. E342/9 Sums due to John Douglas |
| National Archives of Scotland (formerly SRO) | Gifts and deposits | | GD40/4/494/3 |
| National Archives of Scotland (formerly SRO) | Register House Plans | RHP 92691-4 | |
| National Archives of Scotland (NAS) | Records Prefixed 'E' | E 26/12/3 | pp187, 190, 288 |
| National Archives of Scotland (NAS) | Records Prefixed 'E' | E 28/369/54; 28/477/2 | |
| National Library of Scotland | Manuscript Collection | MS 5371, ff196-209 | |
| National Library of Scotland | Ross Collection | | Plans and site notes |
| National Monuments Record of Scotland/NMRS, RCAHMS | Press Cuttings Album about Holyrood Abbey restoration (made uo by Thomas Ross) | | Thomas Ross proposed restoration |