Hi both, thank you for your replies - the rootsweb thing is me yes... He was born 10 July 1892 and his occupation has been listed as Engineer, Mining Engineer and Railway Engineer in various places. I'm not sure if he and my Great Grandmother divorced - but she defnitely returned to England (bringing her 3 children back with her) so they separated or divorced - I can't find a divorce record either. We believe he stayed in the US, but I guess we can't be 100% sure - and unfortunately I have no idea if he died pre or post 1937? I've seen both Frederick Pengilly and Pengelley that Peggy has pointed out to - but the dates aren't right and our Fred was born in Cornwall, England- so I didn't delve any further with them. Our surname is regularly spely incorrectly - Pengilley, Pengelly, Pengelley, Penguilly - ao I have tried all the alternative spellings as well.
The last known existence of him is the 1930 US Federal Census - I guess I'll just have to wait for the 1940 to see if he was still around by then?
Thank you
epebble