Here's that photograph of Uncle Leo in his RAN officer's uniform (see post 23 May 2013). The badge on his sleeve looks like that of a Commander (See RAN ranks).
Leopold James Phillimore Carr (1892-1970) was the second son of TP and Harriett Carr. He had a distinguished career as an Engineer in the RAN, serving for 35 years from 1915. He reached the highest rank possible for a Navy Engineer and was awarded an OBE for service in the Atlantic during WWII.
Check out his entry on the WWII Nominal Roll.
He never married. He was an intelligent, kind and generous man who had a good sense of humour.
I plan to do more research into his life... some day!