I found out that while Chenies Street is marked by some memorials and history, the fact that the Jewish Legion HQ was at 22 Chenies Street is not marked.
I think a small plaque along the lines of:
During World War I, a building at 22 Chenies Street
served as the Headquarters for the Jewish Legion,
a force of over 5000 Jews who served in the
Royal Fusiliers and fought in Palestine 1918
Isn't that a grand idea?
Who, then, will help?