ὀφθαλμόν. The ‘eyes and ears’ of the Great King (cf. Xen. Cyr. viii. 2. 10) were thought by the Greeks to be a sort of spy system (cf. 100. 2), but this is an exaggeration. The ‘eye of the king’, however, was a real officer, in constant attendance on him (cf. Aesch. Pers. 980, and ‘Pseudartabas’ in Arist. Ach. 92).
ἀγγελίας: cf. iii. 84. 2 for ἐσαγγελεύς, a chamberlain admitting to audience with the king.
Artembares, in the other version of the story, is the eunuch cupbearer of Astyages, who adopts Cyrus (Nic. Dam. fr. 66; F. H. G. iii. 398).