Thanks to Wikipedia for this:  “The mountains provided a key vantage point over West Point and Hudson River, lending it historic roles in the American Revolution. Signal fires on the mountain gave both it and the nearby city their name. In 1901 the local chapter of the Daughters of the American Revolution erected a monument at the site of the original signal fire near the summit of North Beacon.”  Old, undivided back, unused Rotograph card D6546.  Grade: 2