After much unsuccessful research, we have now been able to clarify the fate of another Kissingen Realschule student. Philipp Stahl, who came from an old-established Kissingen family, went after his marriage in August 1899 with his wife Theresie Kohl back to Senekal, a small town in Transvaal, South Africa and stayed there until the end of his life in 1946. On the track led us a document that we found in the database "Familysearch", the death entry of his wife, from the year 1950, in which also Philipp's date of death and the names of their three children are noted.

Here is the link to the supplemented short biography.