Cyropaedia: The Education of Cyrus. Xenophon

we have." Then Cyrus asked, "Are his dwellings strongly fortified, or could they be attacked?" And Cyaxares answered, "The actual fortifications are not very strong: I took good care of that. But he has the hill-country to which he can retire, and there for the moment lie secure, knowing that he himself is safely out of reach, with everything that he can convoy thither; unless we are prepared to carry on a siege, as my father actually did."