Upon his arrival in Martinique, Lord Albemarle took command of all the forces assembled on the island and found that his army consisted of twelve thousand men. He divided them into five brigades and formed besides them two bodies, one of four companies of light infantry brought from England, and one battalion of grenadiers under the command of Colonel Guy Carleton, and placed two other battalions of grenadiers under the command of William Howe. He also ordered the purchase of four thousand negroes in Martinique and other islands, who were incorporated into a company with six thousand negroes of Jamaica. When all these preparations had been made, the forces that were to take part in the siege of Havana were under orders of the following commanders: Lord Albemarle, Commander-in-chief. Lieutenant-General George August Eliot, second chief. Field Marshals: John Lafanfille and the Hon. William Keppel. Brigadiers: William Haviland, Francis Grant, John Reid, Andrew Lord Rollo and Hunt Walsh. Adjutant-General: Hon. Col. William Howe; second;--Lieutenant-Colonel Dudley Ackland. Quartermaster General: Col. Guy Carleton; sub-delegate:--Major Nevinson Poole. Secretary of the general-in-chief: Lieutenant-Colonel John Hale. Engineer-chief: Lieutenant-Colonel Patrick MacKellar. Chief of the Military Health Board and of the medical corps: Sir Clifton Wintringham; sub-delegate: Richard Hunck and a staff of three physicians, four surgeons, four druggists and forty-four attendants. A month passed in concluding the details of this well-elaborated plan. Finally on the sixth of May Admiral Pococke started from Martinique in the direction of the Paso de la Mano, where he was joined on the eighth by the division of Captain Hervey, who was blocking the squadron of Admiral de Blenac at Cape France; on the seventeenth they arrived at Cape Nicolas and on the twenty-third they met the Jamaica fleet under command of Sir James Douglas. The British naval forces, including these two divisions and the one that later arrived from North America, consisted of fifty-three warships of various kinds with a crew of ten thousand eight hundred men, and a great number of transports, among them two hundred vessels carrying provisions, hospital supplies, ammunition, etc. When the manner of conducting the expedition was at last decided upon, the fleet ordered to take part in the siege of Havana was composed of the following vessels: