 In 1879 he moved back to Calcutta and travelled around the Sunderbans, Chota Nagpore, Santal Parganas and Orissa regions.He worked along with his colleague Sulpiz Kurz at the Calcutta Herbarium and Dr George King.In 1890, Gamble founded the Forest School Herbarium (renamed the Dehradun Herbarium in 1908).