DEAR SIR, --
The subject of your letter of April 20, is one on which I do not permit myself to express an opinion, but when time, place, and occasion may give it some favorable effect. A good cause is often injured more by ill-timed efforts of its friends than by the arguments of its enemies. Persuasion, perseverance, and patience are the best advocates on questions depending on the will of others. The revolution in public opinion which this cause requires, is not to be expected in a day, or perhaps in an age; but time, which outlives all things, will outlive this evil also. My sentiments have been forty years before the public. Had I repeated them forty times, they would only have become the more stale and threadbare. Although I shall not live to see them consummated, they will not die with me; but living or dying, they will ever be in my most fervent prayer. This is written for yourself and not for the public, in compliance with your request of two lines of sentiment on the subject.
assurance of my good will and respect.