Stevens was the photographer in the McVickers Theatre Bldg in Chicago
Update from Iggy:
This is the most likely...
Ellen A. Vercoe (1850 - 1930) buried in California She and her husband John lived in Chicago in the 1910 US Census. John Vercoe (1847 -1936) Both Ellen and John are buried in San Gabriel Cemetery in Los Angeles County California.
They had a son named William John Vercoe born 11 Aug 1878 and died on 19 Mar 1929 at the age of 40. He was married and had a step-daughter named Irene Kennedy (b. abt 1902).