From eBay auction #522867098 (Old Photograph of Emperor Norton ):
Seller: sccoinstampinc

This is a circa 1850-60's, A picture of Joshua A Norton aka Emperor Norton 
 
A demented man in San Francisco who proclaimed himself Emperor of the
United States. Has some damage on the left side and has a description
og him written on the back. 6 1/2" by 4 1/4".