The dogs had been divided into six teams of nine dogs each.  Wild, Crean, Macklin, McIlroy, Marston, and Hurley each had charge of a team, and were fully responsible for the exercising, training, and feeding of their own dogs.  They called in one of the surgeons when an animal was sick.  We were still losing some dogs through worms, and it was unfortunate that the doctors had not the proper remedies.  Worm-powders were to have been provided by the expert Canadian dog-driver I had engaged before sailing for the south, and when this man did not join the Expedition the matter was overlooked.  We had fifty-four dogs and eight pups early in April, but several were ailing, and the number of mature dogs was reduced to fifty by the end of the month.  Our store of seal meat amounted now to about 5000 lbs., and I calculated that we had enough meat and blubber to feed the dogs for ninety days without trenching upon the sledging rations.  The teams were working well, often with heavy loads.  The biggest dog was Hercules, who tipped the beam at 86 lbs.  Samson was 11 lbs. lighter, but he justified his name one day by starting off at a smart pace with a sledge carrying 200 lbs. of blubber and a driver.

A new berg that was going to give us some cause for anxiety made its appearance on the 14th.  It was a big berg, and we noticed as it lay on the north-west horizon that it had a hummocky, crevassed appearance at the east end.  During the day this berg increased its apparent altitude and changed its bearing slightly.  Evidently it was aground and was holding its position against the drifting pack.  A sounding at 11 a.m. gave 197 fathoms, with a hard stony or rocky bottom.  During the next twenty-four hours the ‘Endurance’ moved steadily towards the crevassed berg, which doubled its altitude in that time.  We could see from the mast-head that the pack was piling and rafting against the mass of ice, and it was easy to imagine what would be the fate of the ship if she entered the area of disturbance.  She would be crushed like an egg-shell amid the shattering masses.

Worsley was in the crow’s-nest on the evening of the 15th, watching for signs of land to the westward, and he reported an interesting phenomenon.  The sun set amid a glow of prismatic colours on a line of clouds just above the horizon.  A minute later Worsley saw a golden glow, which expanded as he watched it, and presently the sun appeared again and rose a semi-diameter clear above the western horizon.  He hailed Crean, who from a position on the floe 90 ft. below the crow’s-nest also saw the re-born sun.  A quarter of an hour later from the deck Worsley saw the sun set a second time.  This strange phenomenon was due to mirage or refraction.  We attributed it to an ice-crack to the westward, where the band of open water had heated a stratum of air.

The drift of the pack was not constant, and during the succeeding days the crevassed berg alternately advanced and receded as the ‘Endurance’ moved with the floe.  On Sunday, April 18, it was only seven miles distant from the ship.