I have watched with interest your generous fund for the relief and liberation of Kansas, now insulted, trodden down, torn, and enslaved by the President of the United States, acting as the tool of the tyrannical Slave Oligarchy. To other funds for this important charity I have already given according to my small means; but, as a constant reader of the “Tribune,” I cannot miss the opportunity which you afford to protest anew against an unparalleled Crime, and to contribute anew to its mitigation. Please to accept the check which I enclose for one hundred dollars. I wish it were more, when so much is needed. Believe me, Gentlemen, your faithful servant, CHARLES SUMNER. PHILADELPHIA, September 23, 1856. REGRET FOR CONTINUED DISABILITY. LETTER TO HON. LEWIS D. CAMPBELL, OF OHIO, SEPTEMBER 24, 1856. HAMILTON, Monday, September 29, 1856. EDITORS OF THE CINCINNATI GAZETTE:-- Tens of thousands of the Friends of Freedom were anxious to meet Senator Sumner at this place on Friday last. Many went away disappointed. I had assured the Committee of Arrangements, that, if the state of his health permitted, he would attend the meeting. I have just received the enclosed private letter, which I venture to hand for publication, that those who were disappointed may understand and appreciate the cause of his non-attendance. It is in answer to a letter in which I urged Mr. Sumner to spend a fortnight in the Miami Valley for recreation, and to appear at the Hamilton meeting, even if his health should not permit him to speak. Very truly yours, &c. LEWIS D. CAMPBELL. * * * * * PHILADELPHIA, Wednesday, September 24, 1856. MY DEAR SIR,--Your letter of the 9th of September, after travelling to Boston, at last found me here, where I am still detained under medical treatment, away from my home, which I have not visited since I left it at the beginning of the late session of Congress, now ten months ago. With sorrow inexpressible, I am still constrained to all the care and reserve of an invalid. More than four months have passed since you clasped my hand as I lay bleeding at the Senate Chamber, and my system is even now so far from the firmness of health that any departure from the prescribed rule is sure to occasion a relapse. I could not reach Ohio except by slow stages; and were I there, I should not have the sanction of my physician in exposing myself to the excitements of a public meeting, even if I said nothing. This is hard, very hard, for me to bear; for I long to do something at this critical moment for the cause. What is life without action? For a while, at least, I must leave to others the precious satisfaction of laboring for Liberty and the redemption of our country. But I have the comfort of knowing that never before was I so little needed.