(ff. i + 21). Lectures i and ii, early version; n.d. (wm 1807). Autograph. includes: f. i Bookplates and Book-stamps: Turner (Charles Mallord William), d. 1934. f.i Charles Mallord William Turner, d 1934: Armorial book plate.: 1934.
(ff. i + 10). Lecture ii (on Vision); n.d. (wm 1807). Autograph. Subscribed (f. 10) 'The End of the Fourth Lecture'. Inserted (f. i) is a note by Dugald Sutherland MacColl, Keeper (1906-1911) of the Tate Gallery.