From the 19th to the 25th of February the circle of investigation was extended to all the northern region of Lincoln Island, whose most secret nooks were explored. The colonists even went the length of tapping every rock. The search was extended to the extreme verge of the mountain. It was explored thus to the very summit of the truncated cone terminating the first row of rocks, then to the upper ridge of the enormous hat, at the bottom of which opened the crater. They did more; they visited the gulf, now extinct, but in whose depths the rumbling could be distinctly heard. However, no sign of smoke or vapour, no heating of the rock, indicated an approaching eruption. But neither there, nor in any other part of Mount Franklin, did the colonists find any traces of him of whom they were in search. Their investigations were then directed to the downs. They carefully examined the high lava-cliffs of Shark Gulf from the base to the crest, although it was extremely difficult to reach even the level of the gulf. No one!--nothing! In short, in these two words was summed up so much fatigue uselessly expended, so much energy producing no result, that somewhat of anger mingled with the discomfiture of Cyrus Harding and his companions. It was now time to think of returning, for these researches could not be prolonged indefinitely. The colonists were certainly right in believing that the mysterious being did not reside on the surface of the island, and the wildest fancies haunted their excited imaginations. Pencroft and Neb, particularly, were not contented with the mystery, but allowed their imaginations to wander into the domain of the supernatural. On the 25th of February the colonists re-entered Granite House, and by means of the double cord, carried by an arrow to the threshold of the door, they re-established communication between their habitation and the ground. A month later they commemorated, on the 25th of March, the third anniversary of their arrival on Lincoln Island. CHAPTER FOURTEEN. THREE YEARS HAVE PASSED--THE NEW VESSEL--WHAT IS AGREED ON--PROSPERITY OF THE COLONY--THE DOCKYARD--COLD OF THE SOUTHERN HEMISPHERE--WASHING LINEN--MOUNT FRANKLIN. Three years had passed away since the escape of the prisoners from Richmond, and how often during those three years had they spoken of their country, always present in their thoughts!