14. Libanius, Or., XI, 114 (I, p. 473 Förster). Cf. Drexler in Roscher,
_op. cit._, col. 378.
15. Pausan., I, 18, 4: [Greek: Sarapidos hon para Ptolemaiou theon
eisêgagonto]. Ruhl (op. cit., p. 4) attaches no historic value to this
text, but, as he points out himself, we have proof that an official Isis
cult existed at Athens under Ptolemy Soter, and that Serapis was worshiped
in that city at the beginning of the third century.