_Vertue's MSS_. (No. 20. p. 319.) were in Horace Walpole's possession,
bought by him, I think, of Vertue's widow; and his _Anecdotes of
Painting_ were chiefly composed from them, as he states, with great
modesty, in his dedication and his preface. I do not see in the
Strawberry-Hill Catalogue any notice of "Vertue's MSS.," though some
vols. of his collection of engravings were sold.