Nothing on Covington but quite a lot on Ames:
1804 List: Candis [freed] by Ames, a spinner, living at Watchfed's(?)

Register:
no. 47, Abraham Church, born in 1769, Yellow complexion, emancipated by Zorobabel Ames's last will & testament of record in Accomack County court.
no. 58, Judah Ames, born in 1788, light black complexin, 5'1-3/8, emanicpated by Zorobabel Ames by his last will...being one of the slaves which the said Zorobabel Ames fell heir to of the Estate of Jno. Christian, Sr.

1813 Personal Property Tax List
Meriah (freed by Ames) living at Ames Ridge
Tom ditto
George ditto
Abrim ditto
Isaac (freed by Ames) and Betty Sample he claims for wife
Liah daughter [of] Isaac (freed by Ames)

Hannah (freed by Ames) living at M.P.
James (N) (freed by Babel Ames) living on Wm Westcoat's land
Solomon (freed by Z. Ames).