Some of the sketches here are worked up in a finished drawing of 1938 HMF 1381. HMF 1337 is the first of many drawings dated between 1937 and 1940 bearing a pair of punched holes along one edge, whose significance has not been determined; some are single pages of approximately 280 x 190 mm, HMF 1338, 1396, 1401a, 1406 - 1409, 1412, 1413,1416, 1472, others are double this size with a fold down the middle, HMF 1338a, 1391, 1391a, 1393, 1394, 1448, 1451,1456, 1459, 1460/1460a. Another group of drawings are double page in size but without the centre fold, HMF 1449, 1452, 1455, 1457, 1458, 1506, 1508, 1513, 1513a, 1514, 1514a. Many of these drawings can be linked stylistically but no attempt has been made to reconstitute as sketchbooks.