The letter was considered by Ross and Vice-Admiral Sir Alexander Cochrane (who had replaced Sir John Borlase Warren earlier that year as the Commander-in-Chief of the North America and West Indies Station of the Royal Navy, headquartered at Admiralty House in Bermuda) in planning how to use their forces. Cochrane's junior, Rear Admiral George Cockburn, had been commanding ships of the squadron in the operations on the Chesapeake Bay since the previous year. On 25 June he wrote to Cochrane stressing that the defenses there were weak, and he felt that several major cities were vulnerable to attack. Cochrane suggested attacking Baltimore, Washington and Philadelphia. On 17 July, Cockburn recommended Washington as the target, because of the comparative ease of attacking the national capital and "the greater political effect likely to result".