Thanks Bugs, but that's the only photo I've got. It looked like a crabapple to me, the flowers were double, pink-tinted white and the leaves had a very serrated edge. I was visiting him in Gippsland, south east of Melbourne, for the first time, so I don't know about the plant's fruit. His wife, who possibly knew the name, was overseas at the time. I'll try asking him again, he's not the best of correspondents!
