From an unidentified sketchbook. There follow 16 drawings on cream medium-weight wove paper in the region of 292 x 242mm that it has not been possible to ascribe to any specific sketchbook; some are probably from Sketchbook 1961-62, others from Sketchbook 1966. Alternatively, there may have been other sketchbooks about which no information survives. See also HMF 3098 and the four drawings of 1964 following, and HMF 3180a and the four drawings following placed at the end of Sketchbook 1966.