After its return to England, the regiment was again stationed at Plymouth with four detached companies in village cantonments; a thirteenth company was added to its establishment, and in the summer of 1703 the nature of its services was changed, and it became a corps of MARINES. A corps was raised for SEA service by King Charles II., in 1664, and designated the admiral's regiment; and during this reign battalions for sea service were formed as the occasions of the state required, of drafts from the land forces, and embarked on board the fleet. In 1689 King William III. incorporated the admiral's regiment in the second foot guards, and two marine regiments were established for service on board the fleet. These regiments were disbanded in 1698; but on the breaking out of the war of the Spanish succession, six regiments of marines were raised, and six regular regiments of foot were placed on the establishment of the navy for sea service.[17] In May, 1703, the QUEEN'S regiment, commanded by Colonel Seymour, was constituted a corps of MARINES; and its colonel was appointed to the care and command of Her Majesty's marine forces. The uniform of the regiment underwent some alteration on this occasion, and the three-cornered cocked hats, worn by the officers and men, were replaced by high-crowned leather caps, covered with cloth of the same colour as the facing of the regiment, and ornamented with devices, the same as the caps worn at this period by the grenadiers.[18] The first service in which the QUEEN'S (now fourth) regiment was called upon to engage after it was constituted a corps of MARINES, was embarking on board the fleet commanded by Admiral Sir George Rooke, for the purpose of conducting to Portugal the Archduke Charles of Austria, who had been acknowledged by the British, Dutch, Imperial, and Portuguese governments as sovereign of Spain by the title of Charles III., an event which excited a lively interest at the time, and from which most important results were anticipated. His Catholic Majesty arrived at Portsmouth on the 26th of December, and was received by the fleet and town with the honours paid to crowned heads; after visiting Queen Anne at Windsor, he went on board, and put to sea, but was driven back by a storm. [Sidenote: 1704] The fleet again set sail on the 12th of February, 1704, arrived at Lisbon on the 25th of that month, and was followed by transports having a British and Dutch force on board under the command of Duke Schomberg, which force was designed to assist King Charles in his attempt to gain the throne of Spain.