Description: Sacandaga Blockhouse: 1777, Fulton County, Mayfield. Sometimes referred to as Mayfield Fort it was built 20 miles north of the Mohawk, just off Van Den Burgh Road close to the southwestern shore of present day man-made Sacandaga Lake (Sacandaga River). Accounts vary and it was either attacked and destroyed in June 1778 or attacked and not destroyed in April 1780. Shown is the only historical marker found in Mayfield. [Description of image] Site of Romeyn's Mill Erected 1773 by Sir William Johnson. Burned during Revolution. Rebuilt by Col. Abraham Romeyn, commander Montgomery County Militia.