there had never been any mention of this "first wife" ever from what i can recall.
i watched the first laura collins story some time ago but from what i can remember she had been l.murdoch stockbridge then l.murdoch radcliffe and was not a collins until she married roger(presumably sometime in the mid-1950's).
are there any thoughts/explainations that might help me out here?
I've always gone with the theory that Jeremiah married Laura when he was very young - maybe sixteen or so. The marriage was a bad one, surrounded by mysterious happenings, and was not really spoken of again. It was a sore subject and Jeremiah didn't like talking about it. That's why it was never mentioned in 1795. It had happened long enough ago that there was no point in bringing it up, and knowing the Collins family, the marriage was kept out of the history books.
Now, as for the age discrepancy, I don't think they ever said Jeremiah and Barnabas were EXACTLY the same age - just that they are around the same age. I could be wrong on that, but I don't recall them ever saying they were exactly the same age.
Vicki expresses surprise at Jeremiah's concern and affection for his nephew, which immediately makes him angry. He chides her for her strange, rude impressions, then yells that he and Barnabas are the same age and as close as brothers--don't ever say such a thing again!