Hi Stuart,
I have found the Beckers on 1901 Census. They had quite a big family, including two sons, Ernest Thomas who died in WW1 and Stewart Charles, who for some weird reason my husband Peter's mum told me, was called "Uncle Bunty". Is that the brother who was married to your great aunt?
Thomas Salmond Aitchison married an Anna Fuller in 1874, just months after Jemima died. She was 22 and he was 38. I tried to find his or her will...but never found it.
June