Further research and questioning has revealed that Albert William Dreyer was likely captured at Gruisfontein, 5 February 1902. With this information, I believe that i have also found the D.Z Mare referred to on his stone Bible. I found this match on the website, Diedelof Ziegvriend Mare, and he was also captured at Gruisfontein. According to my grandpa, Dreyer is mentioned in a book about his commanding general, possibly General S.F Ooshuizen. Due to Dreyer being captured at Gruisfontein, with members and the kommandant ( Sarel Alberts) of the Krugersdorp commando, I believe that he was likely a member of this commando. I have bought a copy of rebel record, but sadly i could not find him.