Though I wished for the contrary, I was expecting such replies to my queries. Given that I am new to both Rootschat and research in England, I really did not expect to find such difficulties at obtaining vital information from records... I realize even more now how privileged I am of being born in Quebec (Canada), where registers access is unrestricted for the last hundred years, and where very complete abstracts are available in major public labraries up to the 1980s.
That being said, I have been going thru the Wiltshire BMD indexes and found nothing more than what I knew. Luckily, as mentioned earlier in this topic, baptisms of eight children of Isaac Mead & Ann ... were found at Tilshead, from Family Search, between 1822 and 1837: that is, not included in the Wiltshire BMD! So, how do I proceed from there? how do I find Ann's family name if not mentioned in the registers?
Is this the kind of query that I should rather put on a "one name studies" board?