Marcus Niebuhr Tod, 1911 Encyclopædia Britannica, Volume 18… (1911)
“ But what chiefly excited his wonder was the strength of its fortifications, which excelled all those of the Greek world. Of the wall, some 51/2 m. in extent, considerable portions yet remain, especially on the north and north-west, and almost the entire circuit can still be traced, affording the finest extant example of Greek fortification. ”
