Christopher Colin Johnston, 1855-1936
Photographer: C.W. Conat, Flint, Michigan
Interestingly, C.W. Conat married a Mary Johnston (b. ca. 1834, d. 1916) from Ontario, Canada. I have found no connection with our Johnston family.
The dating of this albumen photograph, called a cdv or "cartes-de-visite", is based on 2 clues: the oval vignette style was used from 1876 to the late 1880's, and the card stock, a heavy yellow-orange color was used in the 1880's. Cdv's were 2-1/4"x4", but this one is a wee bit wider and the height was evidently trimmed to fit better in the album - a common practice.