Well, I guess I can add that to my list of mistakes in the Osprey Boxer Rebellion book.
Some things it says:
1. Marines in peking had Krags. (edit: They have in the book the photo of US Marines in Peking with Lee rifles, but I read somewhere that the Marines involved with the relief force were armed with Krags.)
2. British officers pistols were .38cal.
3. Their plate for III Seebattalion shows them wearing pith helmets. Other sources I have show only 2 kinds of cloth caps, helmets weren't issued to them yet. (Edit: it also shows them with Gew98s, but all the pictures I have seen from that time frame show GEW 88s)
I think there were others, but I can't remember right now what they were.