The expedition owed its existence to the enterprise and generosity of Henry Grinnell, whose philanthropic mind planned, practical energy equipped, and munificence endowed it. Without Grinnell's action Congress would have failed to fit out the expedition, and the grateful chapter of American co-operation with England in its Franklin search would have been unwritten. Such practical displays of sympathy in matters of general and national interest, now considered the most hopeful signs of international fellowship, may be said to have been inaugurated by the despatch of the first Grinnell expedition on its errand of humanity. Under a joint resolution of Congress, passed May 2, 1850, the President was authorized "to accept and attach to the navy two vessels offered by Henry Grinnell, Esq., to be sent to the Arctic seas in search of Sir John Franklin and his companions." These vessels--two very small brigs, the flagship Advance and the Rescue--were placed under command of Lieutenant Edwin J. DeHaven, an officer of Antarctic service under Wilkes. The vessels had detachable rudders, modern fittings, were admirably strengthened and fully equipped; in short, they were thoroughly adapted to the difficult navigation in prospect. Where Grinnell's forethought and liberality ended there was, says Kane, another tale: the strictly naval equipment could not be praised, and the "crews consisted of man-of-war's-men of various climes and habitudes, with constitutions most of them impaired by disease or temporarily broken by the excesses of shore life;" but he commends them as ever brave, willing, and reliable. The squadron touched at various Greenland ports and then entered the dreaded ice-pack of Melville Bay, in which the sailing vessels made slow progress; but in their besetment of three weeks the only dangerous experience was a "nip," which nearly destroyed the Advance. The movement of the ice-floes is thus graphically told by Kane: "The momentum of the assailing floe was so irresistible that as it impinged against the solid margin of the land ice there was no recoil, no interruption to its progress. The elastic material corrugated before the enormous pressure, then cracked, then crumbled, and at last rose, the lesser over the greater, sliding up in great inclined planes, and these again, breaking by their weight and their continued impulse, toppled over in long lines of fragmentary ice."