Hi Edward,
Thanks for the quick reply and for the marriage details of Thomas Wright and Mary Eldred (which I'd not managed to find).
Thomas Wright and Mary registered 4 baptisms in Haverfordwest, Pembrokeshire: Richard Eldred Wright (1749), Richard Wright (1750), Thomas Wright (1752) and William Wright (1757). I believe Thomas was the only child to survive to adulthood (as he's the only one mentioned in the wills of his uncles).
Thomas Wright Jnr died in 1811 and his Will is the one that mentions his relation Mary Rose. It's a Prerogative Court of Canterbury Will which I can send you a copy of if you want?
Regards,
Dan