With these six persons added to her company, making it twenty in all, the "United States" left Upernavik to enter upon the earnest work of the expedition. The settlement had scarcely faded in the distance, when the icebergs were seen marshaling their forces to give the little voyager battle. A long line of them was formed just across her course, some more than two hundred feet high and a mile long. They were numberless, and at a distance seemed to make a solid, jagged ice-wall. When the schooner was fairly in among them, the sunlight was shut out as it is from the traveler in a dense forest. She felt the wind in a "cat's-paw" now and then, and so the helm lost its control of her, and she went banging against first one berg and then another. The bergs themselves minded not the little breeze which was blowing, but swept majestically along by the under current. The navigators were kept on the alert to keep the vessel from fatal collision with its huge, cold, defiant enemies, as the surface current drove it helplessly onward. Sometimes, as they approached one, the boats were lowered, and the vessel was towed away from danger; at another crisis, as it neared one berg, an anchor was planted in another in an opposite direction, and she was warped into a place of security. Occasionally they tied up to a berg and waited for a chance for progress. While thus beset with dangers, there were occasions of some pleasant excitement. The birds were abundant and of many varieties, affording sport for the hunters and fresh food for the table; the seals sported in the clear water, and were shot for the larder of the dogs; and Dr. Hayes and Professor Sontag found employment with their scientific instruments.