My apologies, I am not being specific enough. The earliest verified record I have is the marriage of William Hayter to Maria Nutley in Micheldever 2 Aug 1815. Anything earlier than that is simply the suggestion of the Ancestry website. Those suggestions give me a guideline to search back earlier, but of course I cannot take anything straight from somebody else's Ancestry tree without verifying it.
James Hayter is suggested as William Hayter's father, and his DoB is suggested only as about 1762. Somebody once evidently researched that, but without knowing their sources, I cannot take it as fact. I cannot even verify William's birth or baptism yet, as none appeared in Micheldever, though a couple of others appeared elsewhere in Hampshire, a 1785 one appearing most likely. This is what I should be verifying first.
My intention was to wait till after Christmas, and purchase some of the Hampshire parish records on CD, which I saw advertised somewhere. I suppose that is the best way to verify any leads I have.