Cancels of NYASALAND

There is a Luwire wildlife preserve at the northern end of Mozambique. Several of the place names in the nearby areas have "Niassa" in them, which tells me that some related ethnic groups traversed the border. So the name Luwire for a town in Nyasaland is plausible, but I can't get hold of a list of towns in Nyasaland, and the lists of towns in Malawi that I've found don't show a Luwire.

I realize that leaves you right exactly where you started from, but it's the best I can do . Great group of postmarks, though; there's nothing that's the same kind of fun as having a postmark from a place I never even heard of.