Henry Flitcroft was an architect active in the 18th century. He became Lord Burlington's draughtsman in 1720, acquired Office of Works positions, culminating with Controller of the Works in 1758, and worked on many country houses in the years between 1722 and 1744.
Bibliography
Colvin, Howard, A Biographical Dictionary of British Architects 1600-1840, 3rd edition (New Haven and London: Yale University Press, 1995), pp. 365-369.