The reptile, aware of danger, had retired between its carapace and plastron. They no longer saw its head or feet, and it was motionless as a rock. Herbert and Neb then drove their sticks underneath the animal, and by their united efforts managed without difficulty to turn it on its back. The turtle, which was three feet in length, would have weighed at least four hundred pounds. "Capital!" cried Neb; "this is something which will rejoice friend Pencroft's heart." In fact, the heart of friend Pencroft could not fail to be rejoiced, for the flesh of the turtle, which feeds on wrack-grass, is extremely savoury. At this moment the creature's head could be seen, which was small, flat, but widened behind by the large temporal fossæ hidden under the long roof. "And now, what shall we do with our prize?" said Neb. "We can't drag it to Granite House!" "Leave it here, since it cannot turn over," replied Herbert, "and we will come back with the cart to fetch it." "That is the best plan." However, for greater precaution, Herbert took the trouble, which Neb deemed superfluous, to wedge up the animal with great stones, after which the two hunters returned to Granite House, following the beach, which the tide had left uncovered. Herbert, wishing to surprise Pencroft, said nothing about the "superb specimen of a chelonian" which they had turned over on the sand, but, two hours later, he and Neb returned with the cart to the place where they had left it. The "superb specimen of a chelonian" was no longer there! Neb and Herbert stared at each other first, then they stared about them. It was just at this spot that the turtle had been left. The lad even found the stones which he had used, and therefore he was certain of not being mistaken. "Well!" said Neb, "these beasts can turn themselves over, then?" "It appears so," replied Herbert, who could not understand it at all, and was gazing at the stones scattered on the sand. "Well, Pencroft will be disgusted!" "And Captain Harding will perhaps be very perplexed how to explain this disappearance" thought Herbert. "Look here," said Neb, who wished to hide his ill-luck, "we won't speak about it." "On the contrary, Neb we must speak about it," replied Herbert. And the two, taking the cart, which there was now no use for, returned to Granite House. Arrived at the dockyard, where the engineer and the sailor were working together Herbert recounted what had happened. "Oh! the stupids!" cried the sailor, "to have let at least fifty meals escape!" "But, Pencroft," replied Neb, "it wasn't our fault that the beast got away, as I tell you, we had turned it over on its back!" "Then you didn't turn it over enough!" returned the obstinate sailor. [Illustration: TURNING A TURTLE] "Not enough!" cried Herbert. And he told how he had taken care to wedge up the turtle with stones. "It is a miracle, then!" replied Pencroft.