Kerry,
Again, no joy. The latest WATERS baptism was Elizabeth d. of Richard & Mary baptised 2 Feb 1737/8 - no WATERS after that to the end of the transcript. Before that were just two in the first decade of the 18th century to Thomas & Mary, but none where the child was Thomas. The closest Thomas WATERS before that was as early as 12 May 1684, son of Thomas & Catharine.
(Sorry I can't easily give you a mass lookup - as Chris very helpfully does - 'cos my source doesn't permit cut-n-paste, so I have to type everything out manually.)
If it's any help the Mayfield register has the following baptism:
30 Mch 1740 Thomas the son of Richard and Mary Waters
I couldn't find the baptism of any sibling.
Regards,
Stovepipe