It affords me unfeigned satisfaction to learn from it that thee approves the plan which I submitted for thy consideration. Anticipating a favorable notice of the suggestion, by a mind so devoted as thine to the promotion of the great ends of humanity, of justice, and of National honor, three pamphlets were prepared, which will be immediately printed, and transmitted to thy address at St. Louis. One of these tracts is designed to show the impolicy and unprofitableness of Slave Labor, etc., and some arguments are drawn from the published opinions of several distinguished citizens _of the slave-holding States_; among which Col. Taylor's are not the least authoritative and cogent. Another essay exhibits a succinct account of the cruelties of the Slave Trade, derived from authentic sources; and a third pamphlet is intended to show that the interminable bondage of any portion of the human race is, on the part of the oppressors, a flagrant violation of natural and Divine Justice, and utterly inconsistent with the doctrines of our Holy Redeemer. Aware of the unpopularity of Philadelphia, and especially of _Quaker_ sentiments on this particular topic, with all those who attempt to justify slavery, it was originally determined to avoid giving any complexion whatever to these publications which might induce the belief that they proceeded from this State, or that individuals of the Society of Friends had any agency in the preparation of them. The coincidence of our judgment in regard to the manner of treating the subject is worthy of remark. If the least benefit results from this humble effort, it will administer to my happiness, which will be augmented by the reflection, that it owes its origin to thy own emphatic summons for aid, in a cause which demands the exercise of every generous and patriotic feeling. That indulgent Heaven may crown thy labors with success, is the sincere desire of thy friend. With great truth and respect, ROBERTS VAUX. To EDWARD COLES, ESQUIRE, Governor of Illinois, Edwardsville, Illinois. P. S.--On my next visit to the city, I intend to communicate thy message to our friend Nicholas Biddle. R. V. GOVERNOR COLES TO MR. BIDDLE EDWARDSVILLE, Sept. 18, 1823.