The original photographs are in an old photo album, that once belonged to Mr. A.D. Bolhuis, an Arab horse breeder active in the Netherlands before and just after WW2. His widow gave the album in 1984 to the then secretary of the Dutch Arab Horse Society. The album is now owned by his widow, Mrs. C. van der Velden.
The photographs may have been taken by the then Dutch consul in Jeddah, Saudi Arabia, Dr. Adriaanse, who was an Arab horse devotee, but that is just a guess. In the album the horses appeared only under their strain names, not their actual names. What I think is clear from the photographs, is that they were taken in Saudi Arabia, possibly just before the transport from Jeddah to the United Kingdom. — Kees Mol