"The tax records for this township which are here reproduced cover the following years: 1750-1751, 1754, 1756-1759, 1763, 1769-1773, 1775, 1777-1783, 1785-1793, 1797, 1799-1803, 1805-1808, 1811-18[12]...On this microfilm, a circle in the upper left-hand corner of a frame indicates the beginning of a new document."