History of the Peloponnesian War
Thucydides
Thucydides. History of the Peloponnesian War. Crawley, Richard, translator. London and Toronto: J. M. Dent and Sons Ltd.; New York: E. P. Dutton and Co., 1914.
who worked their own passage, and arriving at Mitylene, built a single wall all round it, forts being erected at some of the strongest points.
Mitylene was thus blockaded strictly on both sides, by land and by sea, and winter now drew near.