Note 430 — APPENDIX F.
Ernest Georg Ravenstein translation
See Admiralty “Chart showing the tracks of sailing vessels with auxiliary steam power”; the valuable track-charts by Capt. A. Schück in the Jahresbericht of the Hamburg Geographical Society, for 1874; Dr. G. Schott, “Die Verkehrswege” in Zeitschrift für Erdkunde, 1895, with maps; the sailing directories of all ages since Duarte Pacheco wrote his Esmeraldo in 1505.