Mr. Seward to Mr. Clay.
Sir: A despatch under the date of March 3 (No. 30) has been received from Mr. Taylor, accompanied by a treasonable communication written by J. P. Benjamin, at Richmond, to L. Q. C. Lamar, which having been intercepted, fell into the hands of Mr. Taylor.
Please make known to him my thanks for his watchful attention.
I am, sir, your obedient servant,
Cassius M. Clay, Esq., &c., &c., &c.