Thank you for your assistance. I do have both the 1930 and 1940 census you listed and I have filled out two SF180's. Both came back with no information and I have subsequently sent a personal letter as well. I do have Edgar's death certificate, that is how I know his father and mother's names and where he was born. I think I need to come at this from the father's perspective (immigration from Scotland) to be able to figure this out but I am having trouble there as well.
I just have to keep trying:-)