| Argyll & Bute Council Archives | Helensburgh Dean of Guild | | Box 1900-1901 (1/1901) |
| Historic Environment Scotland | Listed Buildings Register | 34851 | |
| Mitchell Library Glasgow | Office Plans and drawings of Watson, Salmond & Gray | TD 1155/14 | Drawings dated 1906 and 1919-20 |
| National Monuments Record of Scotland/NMRS, RCAHMS | Drawings Collection | | DBD 41/1-25 (includes wotk in 1926 and fromation of attic bedrooms 1937-40 and garage 1936 |
| RIBA Archive, Victoria & Albert Museum | RIBA Nomination Papers | | Alexander Nisbet Paterson: F v20 no1431 (microfilm reel 13) |