DEAR SIR,--Since I wrote to you on the 19th ult. I have been at Indianapolis endeavoring to aid the Governor in such way as I could. My desire has been to prevent rash counsels from being followed and from incurring unnecessary expense, and I think I have had some influence in keeping down extravagance. We are appalled every day by some new development of the dreadful conspiracy which has been formed for the entire overthrow of the Government. I hope its worst has now been realized and that whatever may occur hereafter will be for the better. Of one thing the President may rest perfectly satisfied, that the entire voice of Indiana is for the most vigorous prosecution of the War. I have no doubt but that 50,000 men could be raised in a month. All business has been suspended and the people do not expect to do anything until the war is ended. My desire is that it be pushed as fast as it possibly can, not rashly, but rapidly accompanied by such necessary severity as will be a terror to evil-doing. We have nothing to expect from Kentucky or Missouri, they remain partly quiet because of their proximity to the free states. My opinion is that they will not revolt now, or if they do, it will be in that partial way to avoid any entire destruction for the industrial interests of those states. However that may be, they refuse to answer to the call of the President for volunteers and I am totally opposed to their being suffered to remain in the attitude like cow-boys of the Revolution. I am for suspending all trade with them, if they will not furnish their quota of troops.