Note 129 — Chapter XII · THE STONE OF HERCULES.

This was written before the appearance of Mr. Smith’s interesting work on the “Voyage and Shipwreck of St. Paul.” He has vindicated ancient seamanship as to dimensions of vessels, length of voyage, working, &c. One deficiency in that work has been supplied by Humboldt in “Cosmos,” in reference to calculation of distances, or the “Log.”