Henry Clay biography, and a question

HENRY CLAY The biography of this distinquished statesman, written by George D. Prentice, Esq., is allowed to be a very creditable affair, …… except by a few violent politicians…….. We should like to know whether Mr. Clay is a slaveholder, and if so, to what extent? Some have assured us that he is not; others that he owns a FEW slaves……… There are sentiments in some of his colonization addresses, which we are in the highest degree reprehensible and which we shall have occasion to examine.
(Liberator, April 23, 1831, pg 3)