Ann Catherine Tear, wife of Thomas Gawne, in the past was misidentified as Hannah/Ann Tear but she was, as you say, the illegitimate daughter of Jane Goldsmith and Charles Tear.
I have Garrett connections with my own Andreas Gawne line, also through the Curpheys, but I can't see a John Garrett abt 1800.
If you want you can email me [jemblaise tiscali.co.uk]
Jane