John,
Both Forsyth's Medal Roll and the Casualty Roll for the Zulu and Basuto Wars South Africa by I. T. Tavender show the following were all KIA on Jan 22 1879 at Isandhlwana:
Captain Bradstreet
Quartermaster Hitchcock
Sergeant Swan
Trooper W. H. J. Barnes
Trooper Dinkelman
Trooper Greenbank
Trooper McAlister
Tom