"The USS Pickering disappeared on August 20, 1800, with a crew of ninety, en route to Guadeloupe in the West Indies from Newcastle, Delaware." (Berlitz, Bermuda Triangle, p. 64.)
"The USS Pickering disappeared on a voyage to the West Indies in 1800, around August 20." (Quasar, p. 55.)
From the Navy:
Brig USS Pickering believed lost with all hands in a gale in Sep. 1800. Last seen 20 Aug. 1800 when she departed for the West Indies. Approximately 105 drowned.