http://i2.wp.com/upload.wikimedia.org/wikipedia/commons/0/05/Isaac_Pitman.jpg?resize=249%2C323
*UPDATE: reader Ian corrects us! These photographs of Sir Isaac Pitman, Vice President of the Vegetarian Society may have been taken prior to 1873.

Originally, I thought this could be the earliest photograph of a vegetarian. A little piece of man-veg history:

Francis William Newman, Carte-de-visite Photograph, by The London Stereoscopic & Photographic Company, London.

President of the Vegetarian Society of Great Britain from 1873-84