Dr. Hayes had a strong belief in the existence of an open Polar Sea, but it may here be mentioned that subsequent exploration proved that his views were not correct. On the other hand, the view of the old geographers that for a long distance around the Pole the sea was covered with immovable ice has also been disproved. Throughout the whole year the ice is found to be more or less in motion, except where it is in contact with the land. Dr. Hayes expected to be able to start with two vessels,—one a small steamer, to be taken out under sails, and the steam-power only to be used when actually among the ice; the other a sailing vessel, to be employed as a tender or store-ship. He found, however, that the fund which he had raised with great difficulty would only enable him to fit out and man one small sailing vessel. A fore-and-aft schooner of 133 tons register, named _Spring Hill_, was purchased, and after some necessary alterations, was rechristened _United States_. August Sonntag, the astronomer of Kane’s expedition, early volunteered to accompany Hayes. On his return to the United States he was appointed to the Dudley Observatory, Albany, and to accompany Dr. Hayes he sacrificed the fine position of Associate Director of that institution. Including Dr. Hayes, the party numbered fifteen persons. They left Boston on 7th July 1860, and after a rough passage crossed the Arctic Circle on 30th July. The first iceberg was met on the previous day. Some rough weather was experienced in Davis’ Strait, and is thus described by Hayes:— “We were running before the wind and fighting a wretched cross-sea under reefed fore and mainsail and jib, when the fore fife-rail was carried away;—down came everything to the deck, and there was left not a stitch of canvas on the schooner but the lumbering mainsail. It was a miracle that we did not broach to and go to the bottom. Nothing saved us but a steady hand at the helm.