You are looking for a small cache at Margaret Lewis Norrie State Park. For details regarding the Taconic Region Geocaching Challenge, please see MLN #1 Ice Man.
Before the first mechanical alarm clock was invented in 1847, people hired knockeruppers to shoot peas at their windows or tap the glass with long poles so they didn't oversleep for work or during an afternoon snooze. The residents of this property probably did not have to hire a knockerupper, as there were many servants in the mansion who could wake them.