[Cloud modifications] / E Kenyon [Kennion] with Luke Howard. - n.d. [March 1849]. - 4 drawings: pen, watercolour, with white; 28x19cm or smaller; nos. 1 and 4 together in frame 51x37.5x2.5cm. - 1. [Plate 1] Cumulostratus forming; fine weather cirri above. - 2. [Plate 3] Cumulus breaking up; cirrus and cirrocumulus above. - 3. [Plate 4] Cumulostratus; as produced by the inosculation of cumulus with cirrostratus. Cirri above, passing to cirrocumulus. - 4. [Plate 5] Nimbus, or rain cloud. - Original studies of clouds "from nature" by Luke Howard, with landscapes by "Mr Kenyon". These were lithographed by EM Williams and printed by M&N Hanhart as illustrations for the 3rd edition of Howard's Essay on the Modifications of Clouds, 1865. The explanations of plates prefacing this edition are by "LH, March 1849" who gave "a number of sketches" to Kenyon. Clouds and landscapes of drawings 1 and 3 are closely related to engravings in Rees' Cyclopedia, dated (Science Museum copy) 1810 and 1820, after work by "E. Kennion" or E. Kennyon" ie, Edward Kennion (1744-1809). It is not known whether these watercolours were executed by 1809, by Edward Kennion using cloud sketches made by Luke Howard (1772-1864) during his most active time of cloud sketching and observation; or, whether Howard refers to Kennion's son Charles John (1789-1853), also an accomplished landscape artist, who may have worked with these sketches in 1849 or 180-. The watercolours are not dated, and more than one finished study may have been made by Howard from his sketchbooks, at any time 180- to 1849.