In answer to the above appeal 1,500 men, mostly from Missouri, encamped around Lawrence, under such notabilities as Maj. Gens. Strickler and Richardson, Brig. _Gen_. Eastin, Col. Atchison, Col. Peter T. Abell, Robert S. Kelley, Stringfellow and Sheriff Jones. They had broken into the United States Arsenal at Liberty, Clay County, Mo., and stolen guns, cutlasses and such munitions of war as they required. But when this was known the free State men turned out from all the settlements of Kansas with equal alacrity, to defend Lawrence. They came singly, and in squads and in companies. They came by night and by day. Sam Wood, Tappin and Smith, the rescuers of Branson, and who were residents of Lawrence, left the city, and there were none there against whom Sheriff Jones had any writs to execute. Dr. Robinson was appointed Commander-in-Chief for the defense of the city, and James H. Lane was appointed second in command. But Lane was the principal figure in the enterprise. He alone had military experience, and he alone had the daring, the genius and the personal magnetism of a real leader. The free State men, for the last year, had been passing through the furnace-fires of a vigorous discipline, and they would have fought as the Tennessee and Kentucky backwoodsmen of Andrew Jackson fought behind their cotton bales at the battle of New Orleans. They had seen their rights wrested out of their hands by a mob of ruffians, and now they were proposing to settle the matter in that court of last resort that is the final and ultimate appeal of the nations. Except Gen. Lane, they had small knowledge of military tactics, but they knew how to look along the barrel of a rifle; moreover, they would fight behind breastworks, and this to raw troops would have been an immense advantage. It is probable that the first intimation that Gov. Shannon got of the real state of affairs at Lawrence was conveyed to him in the following letter, written by Brig. Gen. Eastin: GOVERNOR SHANNON:--Information has been received direct from Lawrence, which I consider reliable, that the outlaws are well fortified with cannon and Sharpe' rifles, and number at least 1,000 men. It will, therefore, be difficult to dispossess them. The militia in this portion of the State are entirely unorganized, and mostly without arms. I suggest the propriety of calling upon the military of Fort Leavenworth. If you have the power to call out the government troops, I think it would be best to do so at once. It might overawe these outlaws and prevent bloodshed. S. J. EASTIN, Brig. Gen. Northern Brigade, K. M.