Rossian,
They didn't annotate the photos 'cause they knew what they were. They probably never thought that 70 or 80 years later, somebody would be very interested.
I've a photograph taken in the period 1934/35 in Egypt. It shows a most attractive lady in one of the old forts and she was obviously a friend of my father. I'd really like to know who she was and how he let her slip through his fingers!!
Old Duffer