After thinking it over Clark decided, as the less of two evils, to follow the hazardous course of himself announcing his approach. He trusted that the boldness of such a course, together with the shock of his utterly unexpected appearance, would paralyze his opponents and incline the wavering to favor him. So he released the prisoner and sent him in ahead, with a letter to the people of Vincennes. By this letter he proclaimed to the French that he was that moment about to attack the town; that those townspeople who were friends to the Americans were to remain in their houses, where they would not be molested; that the friends of the king should repair to the fort, join the "hair-buyer general," and fight like men; and that those who did neither of these two things, but remained armed and in the streets, must expect to be treated as enemies. [Footnote: Clark's "Memoir."] Surprise of the Town. Having sent the messenger in advance, he waited until his men were rested and their rifles and powder dry, and then at sundown marched straight against the town. He divided his force into two divisions, leading in person the first, which consisted of two companies of Americans and of the Kaskaskia creoles; while the second, led by Bowman, contained Bowman's own company and the Cahokians. His final orders to the men were to march with the greatest regularity, to obey the orders of their officers, and, above all, to keep perfect silence. [Footnote: In the Haldimand MSS., Series B., Vol. 122, p. 289, there is a long extract from what is called "Col. Clark's Journal." This is the official report which he speaks of as being carried by William Moires, his express, who was taken by the Indians (see his letter to Henry of April 29th; there seems, by the way, to be some doubt whether this letter was not written to Jefferson; there is a copy in the Jefferson MSS. Series I., Vol. I.). This is not only the official report, but also the earliest letter Clark wrote on the subject and therefore the most authoritative. The paragraph relating to the final march against Vincennes is as follows: "I order'd the march in the first division Capt. Williams, Capt. Worthingtons Company & the Kaskaskia Volunteers, in the 2d commanded by Capt. Bowman his own Company & the Cohos Volunteers. At sun down I put the divisions in motion to march in the greatest order & regularity & observe the orders of their officers. Above all to be silent--the 5 men we took in the canoes were our guides. We entered the town on the upper part leaving detached Lt. Bayley & 15 rifle men to attack the Fort & keep up a fire to harrass them untill we took possession of the town & they were to remain on that duty till relieved by another party, the two divisions marched into the town & took possession of the main street, put guards &c without the least molestation."