While Pavy and his companions were indulging in their perilous voyage, Lieutenant J. B. Lockwood, one of the most indefatigable members of the mission, was making an extraordinary journey up the west coast of Greenland. He left Fort Conger on April 3 with orders to explore the coast near Cape Britannia and thence to press on in any direction which he thought fit. The ice was rough, the gales were violent, and the cold was intense, the thermometer sometimes sinking as low as 81° below freezing point. In spite of these difficulties, however, he pushed rapidly on, and on April 27 he reached Cape Bryant. Thence he sent back all of his men except two, Sergeant Brainard and Christiansen, and with these companions he made his way forward with renewed ardour. In the course of his journey he crossed Sherard Osborn Fiord, passed the highest point reached by Beaumont in 1876, doubled Cape May, climbed Cape Britannia, and, on May 13, reached Lockwood Island, the highest point attained by any Arctic explorer up to that time (83° 24′ N. 42° 45′ W.). Some miles to the north he saw Cape Washington, the most northern known land, but he was unable to determine whether or not there was land beyond it. Lockwood and his companions then set out on the return journey, reaching Fort Conger without misadventure on June 1. The summer was very warm indeed. The snow melted and uncovered traces of Eskimo habitations, while some of the party actually saw butterflies and bumblebees. But of the ship which they were expecting there was not a trace. As, however, they were amply provisioned for another winter there was no cause for immediate alarm. In the spring of 1883 Lockwood attempted to repeat his exploit of the previous year, but the conditions were against him, and he had to return without fulfilling his object. He immediately set out to assist Greely in his exploration of the interior of Grinnell Land, a work which had been begun during the previous summer. The results of their efforts showed that that country is a positive Paradise compared with most Arctic lands. It is intersected by rivers and long fertile valleys in which browsed herds of musk-oxen, while an enormous glacial lake, some five hundred square miles in area and fed by glaciers, which they named Lake Hazen, was one of its most remarkable features.