In this volume are collected all Ruskin's pieces which deal exclusively with Turner. In one sense the whole body of Ruskin's art work was written around Turner, and there are thus many other pieces which belong in subject to this volume; as, for instance, the greater part of the pamphlet entitled Pre-Raphaelitism, and the third of the Edinburgh Lectures (both in Vol. XII.). But it has been felt impossible to separate those writings from their context, chronological or otherwise. With two exceptions the main writings here collected have both a chronological and a topical unity. They all deal with Turner, and they all were written during the years 1856, 1857, 1858. The exceptions are the last of Ruskin's three catalogues of Turner drawings in the National Gallery, and the Notes on his Drawings by Turner. Of these the former, though published in 1881 as a new pamphlet, was in some sort a revision of the earlier catalogue published in 1857–1858; and the latter, though not written till 1878, describes the collection which Ruskin for the most part had formed and studied in much earlier years.