Hello Dave
I have just found the marriage of John Garlick to Anne Stone 16th June 1788 Topsam Devon.
Rebecca Garlick baptised 6th Decenber 1790 Topsam,Devon
Sarah Garlick baptised 24th March 1793 Topsam, Devon
Ann Garlick baptised 28th June 1789, Topsam, DEvon
Thomas Garlick married Harriet Branscombe 20th September 1919 Topsam, Devon.
Not sure where the Palk comes from but it explains the Stone in William Stone Palk Withers name.
Maybe Thomas is also Thomas Stone Palk Garlick.
This is so amazing
:)Cheers Hazel