Battle of Plassey, map from Malleson's "The Decisive Battles of India from 1746 to 1819",  (1885).
George B. Malleson
Malleson, George B. (1885), The Decisive Battles of India from 1746 to 1819, London: W.H. Allen, <a href="//commons.wikimedia.org/wiki/Special:BookSources/0-554-47620-7" title="Special:BookSources/0-554-47620-7">ISBN 0-554-47620-7</a>, P. 61