1850  On Friday, the 20th of April, we passed through the first "streams" of ice we had seen.
1850  (1851)  The streams became thicker, and occurred oftener. . . .
1852  Suppose that late in the season . . . a piece of wood had been dropped by a ship in Lancaster Sound, at the commencement of an easterly gale, and that it had alighted on a bit of ice at the edge of a "stream," the gale would carry the ice westward into Barrow Straits, at the rate of three or four miles an hour, and before its termination the bit of wood might be at Cape Hotham or Cape Riley, still reposing upon the ice and waiting a fair wind to drift it up Wellington Channel.