A wrong digit can send you looking for an ancestor in the wrong decade. In 19th-century hands the 7 often hangs below the line like a y, the 9 looks like a g, the 4 opens at the top like a u, and the 1 is a bare slash. Ages of babies appear as fractions, and dates before 1752 can carry two years at once.
This lesson shows real numbers from census pages, a family Bible and a gravestone. For each one, compare the digit with others in the same column: the same writer usually made each number the same way every time.











