first process in the production of modelled relief, such as those in the Room of Terracottas, Case 8. A mould (No. =543=) for making a bowl of the ware called Arretine from its place of manufacture, Arretium in Central Italy, is shown, with a cast from the mould beside it. An impression is also shown of the mark of M. Perennius, the most noted of the Arretine potters, in combination with his slave Bargates (No. =544=). Near the mould are stamps, one with a design of a slave heating some fluid in a caldron, and others of a bear and lion (No. =545=; fig. 221). These stamps were used for producing the designs in the moulds, being impressed in the clay while it was soft. Several specimens of these moulds and bowls, which are of about the first century B.C., will be seen in Cases 39-40 of the Fourth Vase Room. [Illustration: FIG. 222.--MOULD FOR LOWER PART OF CLAY LAMP (NO. 546). L. 4-1/4 in.] The moulds for parts of Roman lamps, show the way in which these objects were produced. The clay was pressed into the lower mould (such as No. =546=; fig. 222) and also into a corresponding upper mould (compare No. =547=), and then the two halves were joined together and ready for baking. (=526=) _Cat. of Vases_, II., B 507; (=528=) _Excavations in Cyprus_, p. 26, fig. 50; (=531=) Cf. _Bull. della Comm. Arch._ xxxiii. (1905), p. 146 ff; (=532=) _Cat. of Jewellery,_ No. 609; (=533=) _Excavations in Cyprus_, p. 93, fig. 145; (=535=) _Cat. of Vases_ II., B 432; (=536=) _Proc. of Soc. of Ant._, Ser. II., xvi., p. 40; (=542=) _Cat. of Terracottas_, B 376. pl. 20; (=545=) _Cat. of Roman Pottery_, M 82, 83; (=546=) _Cat. of Lamps_, 1401. =Gems and Pastes.=--In the next division of Case H are objects illustrating the processes of producing Gems and Pastes. These include a series of scarabs, scarabaeoids, and other beads at various stages of manufacture (No. =548=); a series of clay moulds for Graeco-Egyptian porcelain scarabs from Naukratis (No. =549=) and a fine specimen of a paste cameo head of Silenos (No. =550=). Here also are examples of stone socket-handles for a bow-drill (No. =551=). In this and the next compartment several pieces of work are incised with designs intended to be filled in with inlay (No. =552=). See also a series of fragments of an acanthus pattern in ivory, evidently intended to be inlaid. A piece of rock crystal is carved with ears of corn in intaglio, gilded (No. =553=). See also examples of enamel work, of the period of the Roman empire, on studs, seal boxes, etc. (cf. p. 135, 155).