His library was sold at auction by Evans on 11 May 1820 in 243 lots, the anonymous catalogue entitled 'the choice and valuable library of a distinguished man of fashion'. A contemporary note on the copy of the catalogue at Cambridge University Library (shelfmark Munby.c.122(11)), ascribes the collection to Mackinnon.
His library was sold at auction by Evans on 11 May 1820 in 243 lots, under the anonymous catalogue titled 'the choice and valuable library of a distinguished gentleman of fashion'. A contemporary note on the copy of the catalogue at Cambridge University Library (shelfmark Munby.c.122(11)), attributes the collection to Mackinnon.