It was about this time that Mr. Field's thoughts were turned to the possibility of laying a cable across the Pacific, and in that way carrying out his favorite project of completing the circuit of the globe. In writing on April 22, 1870, he says: "I enclose a memorial and bill before Congress in regard to a submarine cable from California to China and Japan." On April 23d: "If I obtain (as I hope) my telegraph bill, I propose that the Pacific Submarine Telegraph Company make an agreement, offensive and defensive, with the submarine lines from England to China _via_ India. Our cable would give an alternate route from China to England, and I would suggest that we have a joint office in China, and that parties there have the option of sending by either line; and in case one line should be down, messages should be immediately forwarded by the other." "_August 20, 1870._ "At the request of prominent members of the United States government we have decided to adopt the following route for the Pacific cable: San Francisco to Sandwich Islands 2,080 miles. Sandwich Islands to Medway Island 1,140 " Medway Island to Yokohama 2,260 " Yokohama to Shang-Hai 1,035 " ------ 6,515 " "Medway Island is the new coaling station of the steamers between California and Japan." He writes to Captain Sherard Osborn in August, 1870: "In your letter of 10th June you state the total length required for the Pacific cable as 7842 nautical miles, and give the price for the whole, complete, as £2,900,000 sterling. This is at the rate of over £382 9_s._ per nautical mile." From a letter written on January 21, 1871: "It is uncertain what Congress will do with regard to the Pacific telegraph." On the 13th of June, 1871, he sailed from New York as one of the deputation from the American branch of the Evangelical Alliance, commissioned to wait on His Majesty the Emperor of Russia in behalf of religious liberty for all his subjects. It was upon his return to England that he wrote the following letter to the Grand Duke Constantine, and the one of September 19th on his return to New York: "LONDON, _11th August, 1871_. "To His Imperial Highness the Grand Duke CONSTANTINE: "_Sir_,--With this I have the honor to enclose a memorial addressed to His Majesty the Emperor of Russia respecting the establishment of a submarine telegraph communication between the west coast of America and the eastern shores of Russia, China, etc. "I shall esteem it a great favor if your Imperial Highness will be so good as to forward the memorial to His Majesty, with any observations on the subject which may be thought desirable.