Psilosis in editions of Herodotus

'... modern texts [of Herodotus] keep the initial aspirate as 'a venerable absurdity' (Powell) [note 158: Papyri of Herodotus display psilosis more often than not.]'

So,  A.M. Bowie apud S. Hornblower (ed.), Herodotus: Histories Book V. Cambridge: Cambridge University Press. 2013: 43.

The reference to Powell's assessment is J. Enoch Powell (ed.) Herodotus: Book VIII. Cambridge: Cambridge University Press. 1939: xviii.