Unknown to Joseph Hooker, December 20, 1861

Frederick, Md., December 20, 1861.

SIR:

I received to-night your dispatch of 5 p.m. and the several telegrams and reports* made since the enemy appeared on the river, and am very much gratified with all that has been done and the results thus far accomplished. So far as I know of events transpiring under your command, your course has entire approval. With reference to possible ulterior movements I have directed General Hamilton to visit Williamsport and other points on the river. He will consult with you, and, if necessary to his purpose, assume command while on the river. You will please aid him in his movements as far as in your power, and oblige, yours, very truly,

. N. P. BANKS, Major-General, Commanding Division. Col. S. H. LEONARD, Commanding at Williamsport and Upper Potomac.