Scoville Library in Salisbury was the first in the United States open to the public free of charge. Salisbury is a town in Litchfield County, Connecticut, United States. The town is the northwest-most in the State of Connecticut. The MA-NY-CT (Massachusetts-New York-Connecticut) Tri-State Marker is located just on the border of Salisbury. The population was 3,977 at the 2000 census. Salisbury was incorporated in 1741, and contains several historic homes, though some were replaced by larger modern structures in the late 20th Century. Historian Ed Kirby tells us that traces of iron were discovered in what was to become Salisbury in 1728, with the discovery of the large deposit at Old Hill (later Ore Hill) in 1731 by John Pell and Ezekiel Ashley. Beginning before the Revolution, during the Federal period, and until around 1920 Salisbury was the seat of an important iron industry.