I've been doing a lot of scanning of old photos and negatives for the past few years, trying to save them from the white ants... In the latest batch I came across this photo, probably from the 1980s, of Georges Mercier's grave at the Old Drift, Livingstone. I am pretty sure that this grave marker was not there on my more recent visit, so I am glad to have uncovered it.
It adds some information to the plaque I posted earlier. The text seems to be:
Born 1874, Georges Mercier, Died of black water fever, 18th Nov. 1900, Aged 26. (He was a Paris Missionary.)