29. William Blake, The First Book of Urizen, plate 25, relief etching, 16.3 x 10.3 cm., etched 1794, proof impression color printed 1794, touched with yellow watercolors. Beinecke Rare Books and Manuscript Library, Yale University. Detail, showing image printed in colors and before being finished in watercolors and pen and ink, and showing the white lines along the escarpments between shallows and relief areas.