European settlers moved into the area before 1800. Nathaniel Dyke, a native of Connecticut, and a captain in the Revolutionary War, serving under both General George Washington and General Warren of Bunker Hill fame, was the first of these in Allegany County. He married a Native American woman (Esther) and moved his family to the Wellsville area by 1795, while it was still owned by the Seneca Nation (two years before the Big Tree Treaty of 1797). He began running a gristmill, a sawmill, and a tannery on a stream now known as Dykes Creek, by 1803. Dyke is buried in Elm Valley, just east of town. His tombstone has the official memorial placed there by the Catherine Schuyler Chapter of the Daughters of the American Revolution.