Below is a photo of the 1879 Hamdaniyah Simriyah mare Sobha, bred in Egypt (Wazir x Selma), bought by the Blunts in 1891, and then sold to Colonel de Sdanovitch in 1899, who sent her to the Russian stud at Derkul.
Photo sourced from the History of Russia in Photographs.
Just noting that this is the first time this photograph makes it to the Arabian horse universe.