Hello Jaxon,
I do not have any new information on the enigmatic mark but I wanted to congratulate you on this exceptional kaskara sword. Attached are two other war trophies picked up by Francis Marwood Hext from the same battle. Estimates of between 2,000 and 4,000 Mahdists were killed or wounded, most of which were Hadendowa tribesmen.
https://www.the-mansfield-collection...-beja-hext-413
https://www.the-mansfield-collection...agger-hext-412
-Geoffrey