One of my grandad's uncles, Lindsay Smith, was born on 23/12/1902 in Dalziel, Lanark, and is listed in the Ellis Island records as going to the USA in 1923. Using Ancestry Canada, I've managed to find him in the 1930 US Census living at Flourston (?), Springfield Township, Montgomery County, Pennsylvania [although his age next birthday is given as 26!].
Does anyone have any suggestions as to how would I go about finding out more about what happened to him after 1930? I've tried various searches on Ancestry, but with no success. He's not listed as far as I have been able to see on the IGI either. He emigrated with his brother Edward, born 1887, whom I can't find anywhere at all

I'm also having the same difficulty with two of his aunties. The first is Isabella McCall (nee Smith) born 1858, who emigrated with her husband Dennis McCall in 1887, whom I've been able to find with their children in the 1910 US Census in Shamokin Borough, Northumberland County, PA, but not afterwards. The second is Elizabeth Duffy (nee Smith) born 1873 who emigrated in 1908 with her children to join her husband Peter Duffy who had emigrated the year before - I can't even find this family in 1910, although I know that they were living in East Linton, Indiana by 1923, as it was Elizabeth that Lindsay and Edward were going to stay with. When Peter Duffy emigrated in 1907, he is listed as going to stay with his brother in law, Dennis McCall, who is listed as living at 537 South Diamond St, Shanoken (which I assume is the same place as Shamokin)
This is my first experience of relations emigrating, so any suggestions on how to find out more gratefully received!
Brian