Liberty Rock, once known as Hog Rock because its shape suggested a hog and was said to contain the imprint of a hog’s foot, served as a lookout post and signal station during the Revolutionary War. From this highest elevation in the area, Milford patriots watched the Housatonic River, then called the Stratford River, to guard against invasion by British forces, and it was possible to see clearly across the river to Stratford. The initials P.P. and the date 1776 were carved into the rock by Peter Pierett, a young native of Milford who led a group known as the Liberty Boys, which later became part of the Minute Men. The rock is 10 feet in diameter, weighs almost 35 tons, is unusual in the locality because no similar rocks or stones of its variety appear for miles around, and stood with its Post Road side as the back, while the original Post Road lay to its north.