Captain Frazer had urged the propriety of heavy artillery accompanying the army, with a view to a bombardment of the city, prior to an assault; and in answer to an argument employed--that Monte Video would be left unprotected--he drew out a detailed statement showing that no less than 145 guns, mortars, and howitzers would be left mounted in that city, besides 270 dismounted. He further showed that there was an abundance of ammunition for these guns; and he detailed three officers to remain behind, of whom he was [Sidenote: Captain Frazer to D. A. G. R. A.] afterwards able to say: “Colonel Brown, Commandant of the Garrison of Monte Video, has expressed to me his high sense of the exertions of Captain Durnford and Lieutenants England and Stopford, whose exertions were unremitting during our temporary absence.” But his appeal was to no purpose. General Whitelocke had determined to land at a place about thirty miles from Buenos Ayres, called Enfinada de Barragon, and thence march over the swamps which intervened, and which would have made the movement of heavy artillery very difficult. With great difficulty, Captain Frazer obtained permission to take three 24-pounders, two 12-inch Spanish mortars, and two 5½-inch howitzers as a reserve, in addition to his field guns; but these, which would have been so useful in the subsequent attack, were not allowed to proceed farther than the village of Reduccion, where the first encounter with the enemy took place. The following was the detail of the Royal Artillery which actually took part in the attack on Buenos Ayres, on the 5th July, 1807:-- [Sidenote: MS. Returns in R. A. Record Office.] 1st Brigade--Captain A. S. Frazer. } 98 N.C. officers and men. 2nd Captain W. D. Nicolls. } 4 6-pounder guns. Lieutenant Lloyd Down. } 2 3-pounder ” 2nd Brigade--Captain James Hawker. } 100 N.C. officers and men. 2nd Captain Henry Lane. } 5 4-pounder guns. Lieutenant Thomas Trotter. } 1 5½-inch howitzer. 3rd Brigade--Captain Alexander Dickson. { 100 N.C. officers and men. Lieutenant J. Mackonochie. { 3 12-pounder guns. ” Falkner Hope. { 4 6-pounder ” { 2 5½-inch howitzers.