Hello Jean,
Welcome to Rootschat! I was fascinated to read your message about the Thomas Whitney who enrolled at the Bluecoat Charity School in 1790.
My 4 X gt. grandfather David, married Susan/Susannah Watkins in St. John the Baptist, Hereford on 9th February 1790. I know that they went to Orcop after that and had 4 children. I found the burials of David & his wife Susannah in St. Weonards Church and the record for David, gave his age as 66, so that would have made him born circa 1763, but as I don't live near to Hereford, I have not been able to check for his Baptism there, in any of the Parish records. I know David & Susan had a son called Thomas Whitney, Baptised Orcop 14th July, 1793 and he died age 39 and is buried in St. Weonards also. So, the age doesn't look right for it being your Thomas Whitney, but I know that records aren't always accurate.
Most of the information I have, has been obtained from Find my Past Parish records and I don't know definately that David was born in Hereford, and as I said, don't live near to Hereford, to go and search their records.
I did find on Find my Past, a David who was Baptised in Aberedw, Radnorshire in 1765, but I have no way of knowing if this is my David and if and when he came to Hereford.
I would be very interested to hear what you think about it all.
Kind regards,
Diana