The builder of Drummuir Castle was Admiral Archibald Duff He served in Nelson's navy and at one time was First Officer on HMS Foudroyant. 

H.M.S. "FOUDROVANT".  
Previous Name: "TRINCOMALEE".  
Year Built: 1817. 
Builders: Wadia Shipyard, Bombay, India. 
Original use: Royal Navy Frigate. 
Present use: In re-build to original condition and specification for use as tourist attraction in Middlesborough. 
Rig: Fully rigged "square" rigger. 
Hull material; Malabar teak. 
Decks: Malabar teak. 
Superstructure: Malabar teak. 
Masts: Wooden. 
L.O.A. Hull: 180 ft. 
Max Beam: 40 ft 3 ins. 
Max draught: 13 ft 6 ins. 
Gross tonnage: 1066 tons. 
Displacement: 1447 tons. 
Original owners: Royal Navy. 
Present owners: Foudroyant Trust, c/o The Marine Society, 202 Lambeth Road, London SEI 7JW. 
Location: Middlesborough. (Previously at Gosport.) 
Condition: Hull in a good condition but vessel is un-rigged. 
Alterations: Rebuilt in 1835 & 1845. 
Bibliography: "The story of a Frigate" by A.J. Marsh. (Available from the Portsmouth Museums Society. ) 
History & Significance: The last surviving transom sterned frigate.

The real Foudroyant was Nelson's flagship during the recapture of Naples in 1799. It was a 3rd Rate. ???? Plymouth. 1798. 80 guns.

In 1897 it was wrecked whilst tied to Blackpool pier.