Chapter XLI.—Making a Skull Speak. But putting a skull on the ground, they make it speak in this manner. The skull itself is made out of the caul of an ox; 271 and when fashioned into the requisite figure, by means of Etruscan wax and prepared gum, 272 (and) when this membrane is placed around, it presents the appearance of a skull, which seems to all 273 to speak when the contrivance operates; in the same manner as we have explained in the case of the (attendant) youths, when, having procured the windpipe of a crane, 274 or some such long-necked animal, and attaching it covertly to the skull, the accomplice utters what he wishes. And when he desires (the skull) to become invisible, he appears as if burning incense, placing around, (for this purpose,) a quantity of coals; and when the wax catches the heat of these, it melts, and in this way the skull is supposed to become invisible. 271     The Abbe Cruice suggests ἐπίπλεον βώλου , which he thinks corresponds with the material of which the pyramid mentioned in a previous chapter was composed. He, however, makes no attempt at translating ἐπίπλεον . Does he mean that the skull was filled with clay? His emendation is forced. 272     Or, “rubbings of” (Cruice). 273     Or, “they say.” 274     Some similar juggleries are mentioned by Lucian in his Alexander , or Pseudomantis , xxxii. 26,—a work of a kindred nature to Celsus’ Treatise on Magic (the latter alluded to by Origen, Contr. Cels ., lib. i. p. 53, ed. Spenc.), and dedicated by Lucian to Celsius.