"The tax records here reproduced for this township [including Columbia], prior to its division in 1818 into East Hempfield and West Hempfield townships, cover the following years: 1751, 1756-59, 1763, 1769-73, 1775-81, 1783, 1785-90, 1792-93, 1796-1803, 1805-07, 1809-11, 1813-1818, Undated. On this microfilm, a circle in the upper left-hand corner of a frame indicates the beginning of a new document."