Original sentence: Anti-Stratfordians also assert Shakespeare's grave monument was clearly altered sometime after the mid-1600's, as Sir William Dugdale's 1656 engraving of the original merely portrays a man holding a grain sack
Edited sentence: Anti-Stratfordians also assert Shakespeare's grave monument was clearly altered sometime after the mid-1600s, as Sir William Dugdale's 1656 engraving of the original merely portrays a man holding a grain sack