diamond fields south africa

anyone help out please , found a piece of paper in my grandfathers bible , it was the death of a George Harrison Stewart, who worked for a newspaper in Diamond Fields ,he died around1956, he was born in Glasgow Scotland , 1863 , my Grandfather was also a Stewart , i found out more about George than my own Grandfather , i dont know if his Father may have been a Uncle to my Grandfather ,i cant seem to find anything on my GGF, i think Georges Father James Stewart may have came at a later date to SA , as i found one on the ships listings , really just living in hope i can tie the two as relations , if anyone can help out , would help me find out more where my own GGF was born and who he actually was ,as just far too many of the same name in Glasgow , living in hope someone from the Stewar Family may have done a Family Tree , most grateful for any ideas , thank you , Jannette ( Scotland UK)