Immediately upon the capture of Fort Henry, work was begun on this line of infantry defence. The garrison, increased by the force from Fort Henry, numbered about six thousand effective men, under the command of Brigadier-General Bushrod R. Johnson. General Pillow, ordered by General A.S. Johnston, arrived on February 9th from Clarksville with 2,000 men. He was immediately followed by General Clarke, who had been stationed at Hopkinsville with 2,000 more; and Generals Floyd and Buckner, who were at Russellville with 8,000 more, followed. General Johnston began to set them all in motion by telegram from Bowling Green, before he received news of the surrender of Fort Henry. General Floyd was so averse to going to Donelson that he continued to remonstrate. General Buckner, whose division had arrived, proposed on the night of the 11th to take it back to General Floyd, his commanding officer at Clarksville; but Pillow, who was senior to Buckner, ordered him to remain, and repaired himself to Clarksville. Under the combined influence of Pillow's persuasion and General Johnston's orders, Floyd finally made up his mind to go, and arrived at Donelson with the last of his command in the night of the 12th. Meanwhile, Major-General Polk had sent 1,860 men from Columbus. On the night of February 12th, Donelson was defended by about 20,000 men. The heavy guns in the water batteries were manned mostly by details from light batteries and artillery drilled a short time before the national force appeared, by two artillery officers, under the supervision of Colonel Milton A. Haynes, Chief of the Tennessee Corps of Artillery. General Grant, in reporting to General Halleck, on February 6th, the surrender of Fort Henry, added: "I shall take and destroy Fort Donelson on the 8th, and return to Fort Henry." It was soon clear that he could not haul wagons over the road, and he proposed to go without wagons and double-team his artillery. The water continued rising. For two miles inland from Fort Henry the road was for the greater part under water. On the 8th he telegraphed: "I contemplated taking Fort Donelson to-day with infantry and cavalry alone, but all my troops may be kept busily engaged in saving what we now have from the rapidly rising water." The cavalry, however, fording the overflow, went to the front of Donelson on the 7th, skirmished with the pickets, and felt the outposts.