Wishing exact information of the position of the enemy and of the topography of the country, the commander-in-chief, on the morning of the 20th, requested Colonel Reed and Colonel Putnam, his engineer, to undertake a reconnoissance in person. Setting out from King's Bridge with a foot-guard of twenty men, these officers proceeded to the heights at East Chester, where they saw some of the enemy near the church, but could obtain no intelligence. The houses in the vicinity were deserted. From this point Reed returned to attend to his office duties, while Putnam, disguising his appearance as an officer by taking out his cockade, loping his hat, and concealing his sword and pistols under his loose coat, continued on alone in the direction of White Plains. Learning from a woman at a house that the British were at New Rochelle, he passed on to within three or four miles of White Plains, where he met some "friends to the cause" and ascertained the general situation. "I found," he writes, "that the main body of the British lay near New Rochelle, from thence to White Plains about nine miles, good roads and in general level open country, that at White Plains was a large quantity of stores, with only about three hundred militia to guard them, that the British had a detachment at Mamaroneck only six miles from White Plains, and from White Plains only five miles to the North River, where lay five or six of the enemies ships and sloops, tenders, etc. Having made these discoveries, I set out on my return." Reporting this information to the commander-in-chief about nine o'clock in the evening, Colonel Putnam retired to "refresh" himself and horse, only to receive orders soon after to proceed immediately to Lord Stirling's brigade,[211] now in Spencer's division, which had already advanced on the road towards White Plains. He reached Stirling at two o'clock that night, and at dawn the general pushed on to White Plains, arriving there about nine o'clock on the morning of the 21st. Washington himself and Heath's division followed during the day, and the troops set to work throwing up lines at that important point. By delaying near New Rochelle, Howe had missed his opportunity. During the night of the 21st, Colonel Haslet, of Stirling's brigade, surprised and captured some thirty men belonging to the partisan Rogers' Scouts, and soon after Colonel Hand with his now veteran riflemen proved himself more than a match for an equal party of yagers encountered near Mamaroneck. In the first of these skirmishes, Major Greene, a fine Virginia officer, was mortally wounded. [Footnote 211: Stirling, who with Sullivan had recently been exchanged as prisoner, was now in command of Mifflin's brigade, Mifflin being absent in Philadelphia.]