| Historic Environment Scotland | Listed Buildings Register | 29514 | 125A and 126 Princes Street |
| National Monuments Record of Scotland/NMRS, RCAHMS | Cowie and Seaton Collection | | CSE 1950/1/1 (Gibson & Laing work) |
| National Monuments Record of Scotland/NMRS, RCAHMS | Dick Peddie and McKay Collection | | DPM/1880/34/1 |
| National Monuments Record of Scotland/NMRS, RCAHMS | NMRS Architects Index | | No other reference |
| RIBA Archive, Victoria & Albert Museum | RIBA Nomination Papers | | David McArthy: L v19 no1431; John Watson: F v18 p51 no1199 (microfilm reel 12) |
| Royal Commission on the Ancient and Historical Monuments of Scotland | Canmore | 116522 | |