Hi Mark,
My ancestor is Susanna Langmaid Scantlebury, married James Harris Braddon in Polruan, Cornwall in 1876.
Her father was Richard, a Mariner.
I have just dabbled on Wikitree and won't be free of another major project until Mid 2024, so can't offer any more on her ancestors until then, to see if we are connected.
Thought I'd check in as Scantlebury, of course, jumped at me here! Wow, she was amazing.
Wish you energy - and luck - in your search.