Sir: You Are, Perhaps, Already Aware that a Party, Consisting of Martin R. Delaney, Robert Douglass, Robert Campbell, Jas. W. Purnell and Amos Aray, M. D. (the Last as Physician), Has Been Commissioned by a Convention of Colored Persons, Held, at Chatham, C.W., to Proceed to Africa, and Select a Suitable Location for the Establishment of an Industrial Colony