Greenwich Hospital (recto) ; Study of a Building (verso), ca. 1831, Watercolor over graphite (recto) ; graphite (verso), on off-white wove paper, Sheet: 10 9/16 x 14 3/4 in. (26. 8 x 37. 5 cm), Drawings, David Cox (British, Birmingham 1783?1859 Harborne, West Midlands), This quick sketch brims with useful information: near the top of the sheet, between the paired columns, touches of blue watercolor (and, elsewhere, the word 'blue') indicate the color of the sky; at the upper right, a triangle of brown wash suggests a pediment; in the center, swift strokes of black, red, and blue describe figures dressed in naval uniform