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Rh May, 1854, states that on the outward passages alone from New York to California, Australia, and Rio Janeiro, American ships, through the use of Maury's Sailing Directions, were saving in time the sum of $2,250,000 per annum, and it is probable that could an estimate have been made of the saving in time to all of the ships using the Sailing Directions, the total amount must have considerably exceeded $10,000,000 per annum.

It should be remembered that this result had been accomplished without expenditure of money, beyond the moderate salaries of Maury and his staff of assistants, and the insignificant cost of printing the blank log-books, charts, and sailing directions.

Sea-captains of all nations regarded Lieutenant Maury as a wise counsellor and faithful friend, while France, Holland, Sweden, Spain, Italy, Russia, Prussia, Austria, Portugal, and Sardinia, all either conferred upon him orders of knighthood or struck medals in his honor.

In 1861, Lieutenant Maury resigned the office of Chief Superintendent of the National Observatory and Hydrographic Office, deeming it his duty as a Virginian to take the side of his State at the outbreak of the Civil War. Upon this occasion he received letters of invitation from the Grand Duke Constantine offering him residence in Russia and every facility for continuing his scientific researches. A similar offer was made by Prince Napoleon on behalf of France, and also by the Archduke Maximilian of Austria. In 1866 a pecuniary testimonial was presented to Lieutenant Maury at Willis's Rooms, London, where he was