In these movements they displayed their enormous strength several times.
Their leaps, although performed with the utmost ease, were so great as to prove the iron nature of their muscles.

They tossed the heavy casks, too, high into the air like tennis-balls, and in two instances, while the crew were watching them, dashed a cask in pieces with a slight blow of their paws.

The tough canvas yielded before them like sheets of paper, and the havoc they committed was wonderful to behold.
"Most extraordinary!" exclaimed Captain Guy, after watching them for some time in silence.

"I cannot imagine where these creatures can have got hold of such things.

Were not the goods at Store Island all right this morning, Mr.Bolton ?" "Yes, sir, they were." "Nothing missing from the ship ?" "No, sir, nothing." "It's most unaccountable." "Captain Guy," said O'Riley, addressing his commander with a solemn face, "haven't ye more nor wance towld me o' the queer thing in the deserts they calls the _mirage_ ?" "I have," answered the captain, with a puzzled look.
"An' didn't ye say there was somethin' like it in the Polar Seas, that made ye see flags, an' ships, an' things o' that sort when there was no sich things there at all ?" "True, O'Riley, I did." "Faix, then, it's my opinion that yon bears is a _mirage_, an' the sooner we git out o' their way the better." A smothered laugh greeted this solution of the difficulty.
"I think I can give a better explanation--begging your pardon, O'Riley," said Captain Ellice, who had hitherto looked on with a sly smile.