Historical Maps of India - Maps of pre-independent India under British rule. Includes a large number of scanned maps. - http://homepages.rootsweb.com/~poyntz/India/maps.html
Historic Maps - India maps during Ashoka, Gupta and British empire. - http://www.freeindia.org/india_maps/historic_maps/index.htm
Antique Maps - 18th and 19th century maps of India. - http://www.earlymaps.com/asia/india.htm