Eduard Meyer,
1911 Encyclopædia Britannica, Volume 25…
(1911)
“ Smerdis was the younger son of Cyrus the Great who, according to Ctesias, on his deathbed appointed him governor of the eastern provinces (cf. Xen. Cyrop. viii. 7, 11) . Before Cambyses set out to Egypt, he secretly caused him to be murdered (Darius in the Behistun Inscr. i. 10) , being afraid that he might attempt a rebellion during his absence. His death was not known to the people, and so in the spring of 522 a usurper pretended to be Smerdis and proclaimed himself king on a mountain near the Persian town Pishiyauvāda. ”
