Fulcher was born around 1737 and died in June 1803. He is perhaps best noted for his patent for a 'Water Proof Composition in imitation of Portland Stone, for stuccoing and colouring New and Old Brick and Stone Buildings' (Colvin, 383).
After his death, Fulcher's business and building work was carried on by his son, Robert (died 1815), who continued to market his father's patented composition.
Bibliography
Colvin, Howard, A Biographical Dictionary of British Architects 1600-1840, 3rd edition (New Haven and London: Yale University Press, 1995), p. 383.