South African units

Fascinating site. I need a bit of help. I have a silver fob watch engraved with 'siege of Ladysmith HMS Powerful 118 days.' This is engraved with the date 1899-1900 and the name of one of my ancestors A.Adams Arm.s Crews. This is misspelt in your lists (Adames) but otherwise there. How do I find out more about him? Peter Jones