 Complete the following phrase:  The house is assumed to have been built about 1718, when Benjamin Flagg II purchased a large tract of land in the area; however, it is not known how much of the building is his original construction, and how much may have been later alteration. According to Caleb Walls Reminiscences, Flaggs son, also named Benjamin, commanded the company of militia, who marched with Col. Timothy Bigelows company of minute men for Lexington, on 