Thank you, Mole and Malky, for your answer!

Unfortunately, on this list
http://www.sashipwrecks.com/WebT.htm, there's no reference about Harmony or Thomas.
Now, I try to find more information about the second ship, coasting brig Thomas. I have got only one reference for her captain (Cape Almanach 1829 on Ancestry24 said Robert Butler), but sometimes, there are some mistakes on Almanach. So I would like to find another one.
I hope it could be a mistake, because I try to find what Richard Butler, captain of the Harmony, did after the loss of his ship.
Sincerely,
