Figs. 37B and 38B, Plate IV., are from drawings taken by me in the Musée de Saint Germain, and were found at St. Pierre-en-Chastre, Oise; others are figured in M. LIGER'S 'La Ferronnerie.'[13] Fig. 39B, Plate IV., is in the British Museum, and was found within the entrenchments at Spettisbury, near Blandford; it was presented to the Museum by Mr. J. Y. AKERMAN. Figs. 40B and 41B, Plate IV., are two found by me in pits in the interior of Mount Caburn Camp, near Lewes.[14] Fig. 41B is of large size, 8 inches in length, and sickle-shaped. All the objects discovered in this camp proved it to be of the late Celtic period; the tin coins found associated with these remains, the bone combs, pottery, and other objects belong to an age anterior to the Roman conquest. Fig. 42B, Plate IV., is a similar one found by Mr. PARK HARRISON in similar pits in the neighbouring camp of Cissbury,[15] in Sussex, which has been shown to have been occupied by people of the same age as Mount Caburn, viz.: the late Celtic period. It will be seen that some of these keys, all of which are of iron, have a small return or pin at the end, which is adapted to fit into a hole, and in the Cissbury specimen this end is flattened, as if to enable it to fit an aperture of special dimensions. [13] 'La Ferronnerie,' tome i., p. 320. [14] 'Archæologia,' vol. xlvi., Plate XXIV., "Excavations in Mount Caburn, conducted by General PITT-RIVERS, F.R.S., in September and October, 1877, and July, 1878." [15] 'Journal of the Anthropological Institute,' vol. vii., p. 425, Plate XI., fig. 12.