Hi Jim and Richard,
Agree with the Dongola attribution after seeing the references, certainly no reason to suspect something else.
The Hausa do have a somewhat T hilted form, but is quite different in construction and the pommel is much fatter. Good example from David:
http://www.vikingsword.com/vb/showthread.php?t=4343
As always, fantastic info from Jim and lots to read up on.