TURNER, Joseph William Mallord (1775-1851). Autograph letter signed to Abraham Cooper, n.p., n.d., regretting that his contribution falls short of others 'there being no portrait of your humble s[ervan]t', one page, 8vo (slightly discoloured) with a small, thumbnail PENCIL LANDSCAPE DRAWING signed in full at lower left, 35 x 70mm. (both mounted on card); and RUSKIN, John (1819-1900). Autograph letter signed to C.G. Giles, Denmark Hill, 6 January n.y., inviting him to call 'bringing the Turner with you', adding 'The slightest indecipherable fragment of Turner will be interesting to me', 2 pages, 8vo (tipped on card). (2)