| Highland Archives | Alexander Ross collection with handlist | | |
| Historic Environment Scotland | Listed Buildings Register | 34153 | |
| National Monuments Record of Scotland/NMRS, RCAHMS | List of jobs supplied by Mr Alistair Ross, Inverness (given to NMRS in 1950s) | | |
| Professor David M Walker personal archive | Professor David M Walker, notes and collection of archive material | | Information on involvement of Scott Morton & Co |
| RIBA Archive, Victoria & Albert Museum | RIBA Nomination Papers | | Cathcart William Methven: F v14 p44 no876 (microfilm reel 11) |