'The sides of the die are plain, the top of the capital flat; its face has four leaves with a trisceles in the centre. A cavity l0 ins. wide has been cut at the back of the capital to carry a lamp. On the upper part pf the die in-low relief is the upper part of Mithras facing front, with arms set at his waist, as he rises from the rock. His cloak covers his body and l. arm; in his r.h. he holds a whip. His head is framed by a panel of ornament, and the rays of his crown are formed by pierced openings through which a lamp, placed in the cavity could throw light.