Monica - thanks for that new information. I have thoroughly searched the IGI, and found nothing. Neither Alexander nor Margaret are mentioned. The only offspring I know about is Alexander born in 1810 in Port Glasgow. He later married a Jane Brown in Abbey Paisley in 1830, and they are not mentioned on the IGI either. Perhaps they went to one of those evangelistic churches that many weavers attended. I only found Alexander's family on the 1851 Census, and I have been busy ever since trying to track them all down.
Around the 1840's I think Alexander and Jane must have moved to Glasgow, as the two youngest members, James and Malcolm were born there.
I have tried to find them on the on-line 1841 Census, but I guess their district in Glasgow (Bridgeton/Camlachie?) hasn't been entered yet.
However, let me thank you again for the information.
Blessings margaret