Said board is authorized to procure for their county a copy of field notes, of the original survey of their county by the United States, and cause a map of the county to be constructed therefrom on a scale of not less than one inch to a mile, and laid off in congressional townships and sections, to be kept open in the office of the county clerk, and the field notes to be deposited in the same office.
R.L. 1910, § 1607.