I am doing the family research for my sister-in-law Mary, whose grandfather was Robert Charles Jarman, born 4 July 1883 in Knightsbridge, South Australia, son of Charles Edward Jarman, born 1859, Beccles, Suffolk, England. This makes Robert Charles your grand uncle.
I have some information on earlier ancestors and also the families of Robert Charles if you are still interested, as I notice your message is ten years old. Happy to contact direct by email if it suits you better. Look foward to hearing from you soon.