Dating photos relies on a combination of: - internal evidence -
clothing, subject matter, composition, props, etc -
identification of people in it - what age were they when the
photo was taken? how does this fit with known birth dates? -
production processes - different materials (eg. type of
photographic paper) and chemical processes resulted in
characteristic types of photo. Standard sizes of commercial
prints have changed over time. - photographer - photographer's
marks and advertising can be used to identify the photographer,
hence the period the business operated. Jayne Shrimpton and
Maureen Taylor's books are good references, but they concentrate
on the 1850-1950 period. The scanned image shows a black-and-
white print. The informal outdoor setting suggests it was taken
by an amatuer photographer. I think this print has been cut down
from a larger original because prints usually had white borders
on all sides. Commercially processed prints tended to come in
standard sizes, which is derived from the size