Terence had, with considerable ingenuity, contrived to erect an electric alarm, so that the moment a foot was placed upon the lowermost path leading up to the house, a bell would ring in the sleeping quarters.
He also succeeded in rigging up the searchlight salved from the wreck, and after many failures the apparatus worked to perfection.
Thereafter every night its great beam was directed skywards, the International Signal, "N.G." (want immediate assistance), being flashed in the hope of attracting the attention of any vessel within seventy miles of the island.
The little party was now completely isolated from the rest of the world.
Before the destruction of the yawl they had the means of making even a fairly long passage, but now this was denied them, for it would be utter madness to attempt to go to sea in one of the captured canoes.
So, realising that the sooner they were in possession of a seaworthy craft the better it would be for them, the inhabitants of McKay's Island debated whether it would be advisable to construct a new decked craft, convert one of the canoes into a cabin boat, or to salvage the wreck of the yawl and patch her up sufficiently to enable them to reach Tahiti.
Even with the appliances at their command, Mr. McKay reckoned that it would take a twelvemonth to make a boat large enough for their requirements. As regards reconstructing one of the canoes, he came to the conclusion that the work might be done, but the canoe being without a keel would be a bad craft in a sea-way; while her light construction would not allow a keel to be fixed without a grave risk of straining the vessel in the first breeze she encountered.
Finally, it was decided that the captured canoes should be utilised to attempt the salvage of the yawl, and on the first fine day the actual work was put in hand.
By means of rollers and a powerful jack, three of the canoes were launched and taken to the scene of the savages' wanton act.
The wrecked boat could be clearly discerned lying on the sandy bed of the lagoon in six fathoms of water, with a slight list to starboard.
Anchoring two of the native craft close to the sunken yawl, Ellerton and Andy contrived to pass the bight of a chain under her bows, the ends of the chain being made fast to two stout cables. A similar device was employed to engage the stern of the wreck, although the fact that her keel was imbedded in the sand added to the difficulty of the task.