"Four dozen, sir."

"Good! I will send all the hatchets we have on board. I think, Mr. Hill, that you had better take up your position on board the schooner until we sail. How about water? That is a most important point."

"The slaves have brought down a large number of staves, sir. They are evidently intended for sugar hogsheads; they are done up in separate packets. I should say there were a hundred of them."

"That is satisfactory indeed. I will send the cooper ashore, and with a gang of the black fellows he will soon get them all into shape. I see that they have relied upon the stream that comes down from the hills for their supply. One of the first moves of anyone attacking the place would be to divert its course somewhere up in the hills. However, with such a supply as these hogsheads would hold, we could do without the stream for weeks. The twenty marines who came ashore with Lieutenant Boldero will remain as part of the garrison."

The work was at once begun. The sailors looked upon it as a pleasant change from the ordinary routine of life on board ship, and threw themselves into it vigorously, while the blacks, as soon as they understood what was wanted, proved themselves most useful assistants. Accustomed in their African homes to palisade their villages, they knew exactly what was required. Some, with their hoes, dug a trench four feet deep; others dragged down the poles as the sailors cut them, erected them in their places, and trod the earth firmly round them. Others cut creepers, or split up suitable wood, and wove them in and out between the poles; and, by the time darkness fell, a surprising amount of work had been accomplished.

One of the storehouses was turned over to those who could not be berthed on board the schooner, most of the slaves preferring to sleep in the open air, which to them was a delightful change after being cooped up for weeks in the crowded hold of a ship, or in the no less crowded barracoons. Sentries were posted as soon as it became dark, but the night passed off without an alarm, and at daybreak all were at work again. The launch returned to the frigate when work was knocked off, and came back with a fresh body of men in the morning, and with the carpenters, coopers, and all the available tools on board. By the evening of the third day the work was completed. Four banks of earth had been thrown up by the negroes against the palisade, and on each of these three guns were mounted. The hut for the garrison had been completed. The hogsheads were put together and filled with water, and a couple of hundred boarding-pikes were put ashore for the use of the negroes.

Nat had been fully employed, with the schooner's crew, in removing the guns from the batteries, and placing them on the platforms constructed by the carpenters on the top of the earthworks.

"It is quite possible," the captain said to Mr. Playford, "that this creek is used by pirates as well as slavers. They may come in here to sell goods they have captured suitable for use in the islands, such as cotton cloths and tools, and which it would not pay them to carry to their regular rendezvous. It will be great luck if one or two of them should put in here while I am away. It would greatly diminish the difficulty we have of getting the slaves away."

"That would be fortunate indeed, sir. Even if two came in together we could give a good account of them, for as the palisade is mostly on higher ground than the huts, we should only have to slue the guns round and give them such a warm welcome that they would probably haul down their flags at once."

"Yes. You had better tell Mr. Glover to run up the Spanish flag if any doubtful-looking craft is seen to be making for the entrance, and I should always keep a couple of signallers up on the cliff, so as to let you know beforehand what you might have to expect, and to see that there is nothing showing that could excite their suspicions, until it is too late for them to turn back."