The menial and industrial work fell to the pirates' captives. They were made to toil; but Porfirio was intelligent enough to realize that no man can perform a good day's work if he is half-starved. There was plenty of food on the island, so the prisoners had enough to keep them in working trim.

Amongst the pirates there was one hard-and-fast regulation that occasioned considerable discontent, but Porfirio showed unrelenting sternness with regard to it. He absolutely barred the use or possession of intoxicating spirits; not because he was an adherent to the tenets of Pussyfoot, but because he knew the dire results of plying Malays and Chinese with strong drink. Although he, his lieutenants, and the South American section of his band were hard drinkers, they voluntarily agreed to desist from the use of alcohol, so that the Asiatics would have no cause for jealousy.

Within the two hours allowed by Black Strogoff the Donibristle's men, marshalled into working-gangs, went to their stated tasks. The pick of the engine-room staff, under the supervision of Angus and Withers (the latter had resumed his official status), marched off to join the other forcibly-recruited workmen in the blacksmiths' and machinists' shops. The deck-hands and the remainder of the firemen were divided into two parties. One, under Branscombe, was to proceed on board the Donibristle and unload her cargo; the other, under Burgoyne, was told off to haul the booty to the top of the cliff and carry it into the store-houses.

Although the work of despoiling his own ship was an irksome and depressing task, Burgoyne felt glad to a certain extent that it fell to his lot. It gave him an opportunity to study the lay of the land, which, had he been sent to toil in the workshops, would have been denied him.

Escorted by two Peruvian half-castes, armed with automatic pistols and long, heavy knives, the Third Officer's men were taken to the edge of the cliffs surrounding the spacious landlocked harbour. From this point of vantage Burgoyne could observe not only the greater part of the anchorage, but a considerable portion of the island as well.

At one time there had been a powerful electric crane built on the edge of the cliff, its longer arm projecting well beyond the almost vertical wall of rock. The electric plant had given out, but the crane still remained, rusty, but to a certain degree serviceable. It had to be worked and trained by manual power, the hauling-up gear consisting of a large winch bolted to the bed of the former electric capstan.

It took the party the best part of two hours to overhaul and prepare the flexible steel ropes and treble-sheaved blocks, while Burgoyne, keenly on the alert lest any of the men should incautiously run needless risks, kept all his attention upon the movements of the active fellows swarming on the latticed steelwork. But when all preparations were completed, and the hard-worked men had to await the first consignment of cargo from the Donibristle, Alwyn found an opportunity to survey his surroundings.

Except for the conical hill that he had noted on his way from the tunnel to the compound, Burgoyne found that the crane was situated on the highest part of the island, although, when not in use, it could be run back on four parallel lines until it was invisible from seaward.

He judged the island to be in the form of an irregular oblong, three miles from north to south, and two miles from east to west. On the east side lay the landlocked harbour with its outer barrier of detached granite cliffs. Judging by the colour of the water the harbour was almost uniformly deep, with the exception of a rocky patch immediately inside the entrance on the port hand, and another about a cable's length from the extreme southernmost part of the curve of the shore. A mile beyond the entrance was coral reef, but how far it extended, and in what position was the entrance to the lagoon, Burgoyne had at that time no means of ascertaining, as both on the right hand and on the left the edge of the cliff cut the skyline.

Directing his attention inland, Alwyn saw little to be of assistance to him. The barracks, workshops, stores, and a building which he concluded was a magazine all lay on a lower level than that of the top of the cliffs. He had no chance of seeing what the southern and western sides of the island were like, except that he knew they must be precipitous. Whether coral reef completely encircled the secret base remained as yet a matter for speculation.