Hi Gail,
Thanks for your message. I have since made a breakthrough with this research. I was never happy with the parentage that others had been publishing for David Childs, a tenuous link which I too had accepted in the absence of anything else, until recently. I did some extensive trawling through digitised images of Dorset parish registers and have found him, erroneously named as Edward Childs in the Ancestry indexes. He was baptised Dec 1735 in Yetminster, a son of Samuel Childs and his wife Elizabeth Mose (Mose - spelling unclear). The images are very hard to read but there are other factors which have helped to confirm this. Samuel Childs's marriage in Yetminster names his parish as Melbury Osmond. His and Elizabeth's other children also turn up back in Melbury Osmond later, along with David and his brother Samuel (born 1748 and baptised 1752 in Chetnole). What was also troubling, the supposed father of David, Joseph Childs, makes no mention of a son David in his will but includes all of his children who were baptised in Dorset. I think the baptism record for David Childs in Axmouth which once appeared on Family Search (and now doesn't appear to exist) was in error.
I haven't yet seen anything which confirms Mary Wellman being a widow, apart from some dubious records on Family Search. Though there are several Wellman families in the area I haven't yet placed her in one. I had discounted her as the spouse of William Wellman of Melbury Sampford (married 1744) mainly because they were having children between 1746 and 1757 which means that to have still borne children in 1787 (her youngest) she would have been about 57-60 years old.
I have heard about Lydia's story from Michaela, the author of that site, who I have discussed my early Childs research with. She writes it up very well though obviously reluctant to add the Childs ancestry I have as the proof, while sound, is subjective due to the poor quality of the records.
In any case we are definitely related through your Lydia. I am a descendant of her sister Elizabeth, who married her own cousin Samuel.
Thanks again and if you'd like to get in touch I'd be happy to share info with you.
Kind regards,
Kelly.