Élisée Reclus,
The Earth and its inhabitants, Volume 1…
“ The Black Sea has a maximum depth of over 1,000 fathoms, but the narrow strait which joins it to the Sea of Marmara is shallower than many a European river. The cavity filled by the Sea of Marmara is far inferior to that of many an inland lake; and the Dardanelles, like the Bosphorus, are hardly wider than a river. In the Archipelago and the eastern basin of the Mediterranean proper the depth corresponds with the protuberance of the land. ”
