| Charter Room, Blair Castle Archives | Drawings and Manuscripts Collection | | Copies in NMRS |
| Charter Room, Blair Castle Archives | Drawings and Manuscripts Collection | | Hopper's original drawings |
| Historic Environment Scotland | Listed Buildings Register | 5601 | |
| National Archives of Scotland (formerly SRO) | Register House Plans | RHP 34515-34608 | Copies of Hopper's drawings |
| National Monuments Record of Scotland/NMRS, RCAHMS | Notman Collection Drawings | | Roll 31 (drawings of gates and gate lodges as designed and as executed) |
| RIBA Archive, Victoria & Albert Museum | RIBA Nomination Papers | | James Macintyre Henry: F v14 p77 no895 (microfilm reel 11) |