SIR,--It is possible you may have heard, that in the course of last summer an expedition was meditated, by our Colonel Clarke, against Detroit: that he had proceeded so far as to rendezvous a considerable body of Indians, I believe four or five thousand, at St. Vincennes; but, being disappointed in the number of whites he expected, and not choosing to rely principally on the Indians, he was obliged to decline it. We have a tolerable prospect of reinforcing him this spring, to the number which he thinks sufficient for the enterprise. We have informed him of this, and left him to decide between this object, and that of giving vigorous chastisement to those tribes of Indians, whose eternal hostilities have proved them incapable of living on friendly terms with us. It is our opinion, his inclination will lead him to determine on the former. The reason of my laying before your Excellency this matter, is, that it has been intimated to me that Colonel Broadhead is meditating a similar expedition. I wished, therefore, to make you acquainted with what we had in contemplation. The enterprising and energetic genius of Clarke is not altogether unknown to you. You also know (what I am a stranger to) the abilities of Broadhead, and the particular force with which you will be able to arm him for such an expedition. We wish the most hopeful means should be used for removing so uneasy a thorn from our side. As yourself, alone, are acquainted with all the circumstances necessary for well-informed decision, I am to ask the favor of your Excellency, if you should think Broadhead's undertaking it most likely to produce success, that you will be so kind as to intimate to us to divert Clarke to the other object, which is also important to this State. It will, of course, have weight with you, in forming your determination, that our prospect of strengthening Clarke's hands, sufficiently, is not absolutely certain. It may be necessary, perhaps, to inform you, that these two officers cannot act together, which excludes the hopes of ensuring success by a joint expedition. I have the honor to be, with the most sincere esteem, your Excellency's most obedient and most humble servant. TO GENERAL DE RIEDESEL.[87] RICHMOND, May 3, 1780.