The Law relating to Charts and Sailing Directions. H. Stuart Moore, London, 1904.

Notes bearing on the Navigation of H. M. Ships. Hydrographic Office, London, 1900.

The Relations of Harbors to Modern Shipping. W. H. Wheeler, in Engineering News, September 6, 1906, New York.

Wrinkles in Practical Navigation. Capt. S. T. S. Lecky, London, 1899.

Navigation and Compass Deviations. Commander W. C. P. Muir, U.S.N., Annapolis, 1906.

The Practice of Navigation. Henry Raper, London, 1898.

Lehrbuch der Navigation. Reichs-Marine-Amt, Berlin, 1906.

The Nautical Magazine, London.

Dangers and Ice in the North Atlantic Ocean. Bureau of Navigation, U. S. Navy Department, 1868.

Reported Dangers in the North Pacific Ocean. U. S. Hydrographic Office, 1871.