Mum, would you treat them all the inquiries of Dekay and Le Conte, the muse of Halleck and Rufus W. Griswold, Lewis Gaylord Clarke, Francis L. Hawks, John A. Dix, George Bancroft, Fitz Greene Halleck, John Duer, William C. Bryant._ ROCHESTER, Friday, Sept. 19, 1851. MY DEAR SIR:--...I beg you will credit it, there.