On the 8th of April 1777, within a single week of quitting the Worcester, this youth, who had not yet completed the nineteenth year of his age, passed his professional examination for a lieutenancy; and, on the day following, received his commission as second lieutenant of the Lowestoffe of thirty-two guns, commanded by Captain William Locker, since Lieutenant-Governor of Greenwich Hospital, in which situation he died on the 26th of December 1800.

This ship, in consequence of the dispute with the American colonists, who had, on the 4th of July 1776, declared themselves free and independent states, under the name of the Thirteen United Provinces, and which terminated in their separation from the mother-country, was ordered to the West Indies; there to remain, as one of the squadron under the good and gallant Admiral Gayton: an old officer of such distinguished activity and success, that his cruizers captured, while he commanded on the Jamaica station, no less than two hundred and thirty-five American vessels.

The worthy Comptroller of the Navy having thus secured rank, and a prospect of active employ, for his meritorious nephew, they parted with most affectionate adieus, and in the fullest hopes of again meeting. This, however, was not to happen: they never more beheld each other! His uncle was elected member of parliament for Portsmouth, in 1778: and died, in the month of July, that year; leaving a handsome legacy to his nephew, as well as to all the rest of his sister's children.

Captain Locker, who was a very friendly man, as well as an intelligent and skilful commander, became greatly attached to his young lieutenant, and very liberal of scientific and professional instruction. The youth had been powerfully recommended; and, as usual, he recommended himself still more powerfully. On his voyage to Jamaica, therefore, where he had before sailed, in a merchantman, with his early friend Mr. Rathbone, he was now a second time receiving nautical instruction; nor did he at present feel inclined to cherish, whatever he might formerly have done, the smallest dread of any professional disappointments in the naval service of his country. He had been fortunate in patronage; and he had also been fortunate enough, through the circumspection of his excellent uncle, to have been constantly placed under none but skilful, brave, and worthy commanders.

Shortly after the Lowestoffe's arrival at Jamaica, a circumstance took place, during a cruize off the island, which affords a striking proof of that inherent firmness of character, and cool presence of mind, for which this heroic youth was always remarkable.

In a strong gale of wind, and a heavy sea, an American letter of marque was discovered by Captain Locker; which, after a short chace, finding it could not escape, struck it's flag to the Lowestoffe. The captain, accordingly, ordered his first-lieutenant to board and take possession of the captured vessel; but, owing to the tremendous sea which was then running, he found himself unable, though a very brave man, to approach sufficiently near, with the boat, to get on board the prize, and had the extreme mortification of being obliged to go back without effecting his purpose. On his return to the Lowestoffe, Captain Locker, who was not a little chagrined at the disappointment, hastily exclaimed—"Have I, then, no officer who can board the prize?" The master, at hearing these words, instantly ran to the gangway, that he might jump into the boat; but the intrepid second-lieutenant, who had been full as attentive and alert as himself, suddenly stopped him—"It is my turn, now," cried young Nelson; "if I come back, too, it will be your's." He then leaped into the boat; and, from his superior expertness in managing it, soon contrived to get on board, and take possession of his first prize.

This, though no real disgrace to the first-lieutenant, was certainly a very high honour to such a strippling as the second; who owed his success, on the present occasion, as he did at many future periods, to the practical knowledge of seamanship which he had always, from his first entering on the service, been sagaciously solicitous to acquire. He seems to have been early of opinion, that a commander who is not capable of being a master, in every sense of the word, must always, necessarily, have a master, in it's worst sense, on board his own ship. This maxim is earnestly recommended to every British youth who enters into the naval service of his country.

Captain Locker was quite charmed with his young lieutenant, and heartily congratulated him on the event. He assured him of his constant friendship; and encouraged him always to ask any indulgence which it might be in his power to grant.

The Lowestoffe, from it's situation with the fleet, had at this time but small scope for active service, Lieutenant Nelson, therefore, ever anxious for professional employ, and ever thirsting for enlarged improvement in experimental seamanship, requested that Captain Locker would favour him with the command of the schooner which was attached as a tender to the frigate. This being readily complied with, he immediately proceeded, in that small vessel, to render himself a complete pilot for all the intricate passages of those islands, which are situated to the northward of St. Domingo, or Hispaniola, and known by the general appellation of the Keys; and soon became as familiarly acquainted with the navigation of them, as he had long been with that of the British channel.

On the 3d of March 1778, Sir Peter Parker, who had, on the preceding 29th of January, been promoted to the rank of Rear-Admiral of the White, arrived at Port Royal, in the Bristol of fifty guns; having been appointed to succeed the brave old Admiral Gayton, as commander in chief on the Jamaica station, who was desirous of retiring to England. He, accordingly, sailed; and, attended by his usual good fortune to the last, added another American capture, of considerable value, on his passage; making, in all, two hundred and thirty-six prizes.