Photos from the Egyptian Expedition to Maximilian's Mexico

Last fall I posted about a little-known Egyptian military adventure in the New World, "A Sudanese-Egyptian Battalion in Maximilian's Mexico," when Egypt was persuaded to provide a battalion of mostly Sudanese troops to support France's ill-fated efforts to make a Hapsburg the Emperor of Mexico. The illustrations I managed to dredge up were mostly old woodcuts and such. Now, however, a nostalgia site on Facebook has come up with a gallery of photos. The caption reads "Egyptian-Sudanese Battalion [katiba] in Mexico, 1863." I can't verify anything beyond that.