Most of the manuscript sources of all five volumes of Modern Painters are now housed in the Pierpont Morgan Library, New York, although some fragments are in other collections, including at the Ruskin Library, Lancaster. None of this material had been thoroughly analysed before the current edition was prepared, although Cook and Wedderburn provide a useful survey (for Modern Painters I see Works, 3.li-liii and 3.680-84). They also incorporate extracts from the manuscripts in footnotes when they consider the variants to be of interest (see Wedderburn's transcript of the Brantwood manuscript of Modern Painters I). Ruskin gave the bulk of the manuscripts to George Allen on 16 May 1885 when staying at Orpington (see George Allen's ownership of manuscripts of Modern Painters). They were in a chaotic state, so it is not surprising that fragments remained at Brantwood and were later dispersed separately. Part of an early draft for volume I and some notes for volume II were still at Brantwood in 1912 ( Works, 38.201). The two extant manuscripts of Modern Painters I in the Morgan together contain drafts of about half the printed book (see Brantwood manuscript of Modern Painters I, Allen manuscript). The absence of a complete manuscript could be explained by Ruskin's proposed rearrangement of Modern Painters I later in his career (see also lesser manuscript material associated with Modern Painters I and missing manuscripts of Modern Painters I).