Indeed the boats' crews had scarcely bent their backs in response to the signal when there arose a sudden startled outcry on board the ship, followed by a volley of hurried commands and the hasty trampling of feet upon her decks. But we were so close to her, when discovered, and the surprise was so complete, that her crew had no time to do anything effective in the way of defence; and in little over a couple of minutes we had swept up alongside, clambered in over her lofty bulwarks, driven her crew below, and were in full possession of the _Dona Isabella_ of Havana, mounting twelve guns, with a crew of forty-six Spaniards, Portuguese, and half-castes, constituting as ruffianly a lot as I had ever met with. She had a cargo of seven hundred and forty negroes on board, and was far and away the finest prize that had thus far fallen to the lot of the _Psyche_. So valuable, indeed, was she that Captain Harrison decided not to trust her entirely to a prize crew, but to escort her to Sierra Leone in the corvette; and some two hours later, having meanwhile made all the necessary dispositions, the two craft trimmed sail with the first of the sea-breeze and hauled up for Sierra Leone, where we arrived a week later after an uneventful passage. CHAPTER TWO. IN THE FERNAN VAZ RIVER. While we were awaiting the formal condemnation of the _Dona Isabella_ by the Mixed Commission, and the trial of her crew upon the charge of piracy, Captain Harrison, our skipper, busily employed himself, as was his wont, in hunting up information relative to the movements, present and prospective, of the slavers upon the coast. And this was not quite so difficult to do as might at first be imagined; for, Sierra Leone being the headquarters, so to speak, of the British Slave Squadron, the persons actually engaged in the slave-trade found that it paid them well to maintain agents there for the sole purpose of picking up every possible item of information relative to the movements and doings of that squadron. For it not unfrequently happened that, to those behind the scenes, an apparently trivial and seemingly quite worthless bit of information, an imprudent word dropped by an unwary officer respecting one of our vessels, enabled the acute ones to calculate so closely that they often succeeded in making a dash into some river, shipping a cargo of slaves, and getting clear away to sea again only a few hours before our cruisers put in an appearance on the spot. And in the same way our own officers, by frequenting, in disguise, the haunts of the slavers and their agents, very often succeeded in catching a hint that, carefully followed up, led to most important captures being made. It was, indeed, through a hint so acquired that we had been put upon the track of the _Dona Isabella_.