SIR,--Your favor of December 2d came to hand some time ago, and I perceive in it the proofs of a mind worthily occupied on the best interests of our common country. To carry on our war with success, we want _able_ officers, and a sufficient number of soldiers. The former, time and trial can alone give us; to procure the latter, we need only the tender of sufficient inducements and the assiduous pressure of them on the proper subjects. The inducement of interest proposed by you, is undoubtedly the principal one on which any reliance can be placed, and the assiduous pressure of it on the proper subjects would probably be better secured by making it the interest and the duty of a given portion of the militia, rather than that of a mere recruiting officer. Whether, however, it is the best mode, belongs to the decision of others; but, satisfied that it is one of the good ones, I forwarded your letter to a member of the government, who will make it a subject of consideration by those with whom the authority rests. Whether the late discomfiture of Bonaparte will have the effect of shortening or lengthening our war, is uncertain. It is cruel that we should have been forced to wish any success to such a destroyer of the human race. Yet while it was our interest and that of humanity that he should not subdue Russia, and thus lay all Europe at his feet, it was desirable to us that he should so far succeed as to close the Baltic to our enemy, and force him, by the pressure of internal distress, into a disposition to return to the paths of justice towards us. If the French nation stand by Bonaparte, he may rally, rise again, and yet give Great Britain so much employment as to give time for a just settlement of our questions with her. We must patiently wait the solution of this doubt by time. Accept the assurances of my esteem and respect. TO MR. SAMUEL GREENHOW. MONTICELLO, January 31, 1814.