"City of Benares" by Lieutenant-Colonel Charles Ramus Forrest (1750-1827). He was an amateur artist who also served in the British (East India) army from 1802-1827.
Like many Englishmen and women, Forrest was enamored of India and its romantic landscapes. He was based in Calcutta, and whenever his regiment was sent upcountry, he would make excursions from the camp on horseback, palanquin or boat, to capture images. He drew sketches of what he saw, and then later coloured them. The image below is of Barrackpore, which was the earliest cantonment town in India: