This design for a secretary and bookcase appeared in Thomas Sheraton’s The Cabinet-Maker and Upholsterer’s Drawing-Book (1793).
For more Sheraton designs see these posts:
Regency Household: A Sheraton Sideboard – Regency Reader (regrom.com)
Regency Household: Sheraton Alcove Bed – Regency Reader (regrom.com)
Regency Household: Sheraton Buffet – Regency Reader (regrom.com)
