While the first book on caricature drawing to be published in England was Mary Darly's "A Book of Caricaturas" (c. 1762), the first known North American caricatures were drawn in 1759 during the battle for Quebec. These caricatures were the work of Brig.-Gen. George Townshend whose caricatures of British General James Wolfe, depicted as "Deformed and crass and hideous" (Snell), were drawn to amuse fellow officers. Elsewhere, two great practitioners of the art of caricature in 18th-century Britain were Thomas Rowlandson (1756–1827) and James Gillray (1757–1815). Rowlandson was more of an artist and his work took its inspiration mostly from the public at large. Gillray was more concerned with the vicious visual satirisation of political life. They were, however, great friends and caroused together in the pubs of London.