I've asked this question on TMP 19th Century painting guide posts and not really had much help, so I thought I would ask the highly informed among you on here as well.
This question was floating around my head having seen the colour picture in Stuart Asquiths book from Partizan Press where an Egyptian is shown negotiating with what appear to be Mahdist troops led by an Emir on horseback, who seem to have some Egyptian troops held captive. One of the Mahdists has a distinctly Arabic/Berber/Bedouin sort of appearance. Then I went to Derby Worlds and saw the lovely Sudan game being displayed by John Grant and friends where they seemed to have some mounted Berber types armed with bows and carrying medieval shields. I completely forgot to ask them about these figures, so I thought I'd ask on here. I know the Mahdists captured Berber and so they must have had Berbers around them, and pictures seem to show figures in Berber type dress being used as native guides by the British, but no mention in any of the books I've read as far as I can remember. I thought they would add some colour and variety to a Mahdist force, so is there any proof they ever joined forces, or is it one of these cases where you can do as you like as there's no proof one way or t'other?