This particular drawing can no longer be found in the collection, and is illustrated here by a surrogate, a drawing of the same subject made at half past four (about an hour earlier than the missing drawing) on the same day, in the collection of the British Museum (accession no. 1931-6-18-1).
Presumably presented by John Ruskin to the Ruskin Drawing School (University of Oxford); first recorded in the Ruskin Drawing School in 1906; not recorded in the Drawing School subsequently.
Taylor, Gerald, ‘John Ruskin: A Catalogue of Drawings by John Ruskin in the Ashmolean Museum, Oxford’, 7 fascicles, 1998, Oxford, Ashmolean Museum, no. 375
Ruskin, John, ‘Educational Series 1878’, 1878, Oxford, Oxford University Archives, cat. Educational no. 109
Ruskin, John, ‘The Ruskin Art Collection at Oxford: Catalogues, Notes and Instructions’, Edward T. Cook and Alexander Wedderburn, eds, The Works of John Ruskin: Library Edition, 39 (London: George Allen, 1903-1912), 21, cat. Working Series no. II.42
Ætna, at day-break, half past five o'clock on an April morning. The white vapour is not smoke but pure steam. I hope to better the sketch, but the solemnity of the scene itself justifies me, I think, in placing it here, for I never, until I saw it, had myself any conception of the purity of the stream of volcanic cloud, nor of the way it became heavenly cloud at last in peace. The height of the pillar above the crater is about 2000 feet, and its breadth about a quarter of a mile.