Debra, thank you very much. You've given me food for thought. I had looked at the material on Susannah Price, convict, but hadn't noticed the Birkenhead detail (probably because I'm struggling to follow many of the details on those convict records!).
I just couldn't work out how she'd marry William Watson when there was a record of her marrying Henry Tindall. Never really occurred to me to doubt Watson & Price had married, since he gave info for certificates in NSW, when I would imagine he really didn't need to disclose much of that information at all.
I spent much of yesterday trawling records for Leader/ledder, Price & Wells (the convict who did marry a William Watson) & came up with nothing to create a decent link. However, I did discover that Wedgebury, Susannah Wells' native place, is probably Wednesbury, Staffordshire, so that answered one question I hadn't been able to answer.
Not sure what you mean about the relationship with Henry Tindall probably ending around 1850 when she was "assigned to her husband". Was she assigned to Tindall?
Thanks for the explanation about NP meaning native place in regards to family members. I had no idea what that meant, & had thought it referred to Newgate Prison. Maybe with names of brothers & sisters I can find something on the 1841 census, even though their surnames will be different.
Got lots to check out now - just what I like. Thank you so much. Hope I am able to let you know soon whether I've come up with something, especially if there is anything that helps me work out whether William Watson was a convict, &, if so, which one he was (since no one on the Tasmanian records seems to fit very well with the info I have from certificates).