WASHINGTON, March 9, 1859.

To the Senate of the United States:

It has become my sad duty to announce to the Senate the death of Aaron V. Brown, late Postmaster-General, at his residence in this city on yesterday morning at twenty minutes past 9 o'clock.

The death of this distinguished public officer, especially at the present moment, when his eminent services are so much needed, is a great loss to his country. He was able, honest, and indefatigable in the discharge of his high and responsible duties, whilst his benevolent heart and his kind deportment endeared him to all who approached him.

Submitting, as I do, with humble resignation to the will of Divine Providence in this calamitous dispensation, I shall ever cherish his memory with affectionate regard.

JAMES BUCHANAN.