I'm not sure that Charles Albert Amherst Robertson was the owner of the car. I found an obituary in the Times dated 26/6/1935 for Charles Amherst Robertson "ROBERTSON-On June 25th, 1935, at Castlebar House, Ealing, Charles Amherst, beloved husband of Sarah Robertson, aged 68". He would therefore have been born about 1867. Sarah died on 15th May 1964 in her 92nd year (Times, 16/5/64). C.A.A. Robertson could possibly be the son of Charles and Sarah although I have no proof of this. Lucy Ann Amherst (1834-1881) was the first wife of Charles Thomas Amherst (1832-1909) and they had two daughters, Lucy and Sarah. There is a lot more about the Amherst family on the rootsweb.ancestry.com website. Many of them are buried in Brompton Cemetery. Ealing Library has a local history section which would be a useful starting point to find out more about Castlebar House.
Catriona Mitchell ● 4291d