Have you seen this site?
www.denhamhistory.online/post/the-trenleys-of-denhamIt seems Sarah Trenley was from Denham in Buckinghamshire.
The person who has traced this Trenley family says
"I began my journey through the history of the Trenley family with the discovery of six times great grandmother Sarah Trenley, wife of Isaac Headland, a chapman or itinerant pedlar. The family's travels resulted in some of their children being born or buried in Denham. Sarah appeared before the St Clement Danes Pauper Settlement Board in 1800 when her family fell on hard times.
She has traced the Trenley family back in Denham - Sarah's grandmother Hannah Trenley left a will in 1734. Hannah's father was a weaver who died in 1681 - she doesn't say if he left a will, but he may well have done.
" Buckinghamshire archives hold details of numerous dealings by the Trenleys"
Have you checked these archives to see if there is any mention of the Headlands?
It says the lady who has made the post would love to hear from any Trenley relatives.
Perhaps she may know a little more about Isaac Headland.
Good luck!
