In 1856, Jack Armstrong’s son, William (or “Duff”), was charged with murder. A witness had claimed that he had seen Duff and another kill a New Salem man late at night by the light of full moon. Lincoln pulled out an almanac and proved that the witness could not have seen anything at all, as the moon was at its quarter and had actually set over an hour before. Duff was acquitted, and Lincoln won the case. | In 1856, Jack Armstrong’s son, William (or “Duff”), was charged with murder. A witness had claimed that he had seen Duff and another kill a New Salem man late at night by the light of full moon. Lincoln pulled out an almanac and proved that the witness could not have seen anything at all, as the moon was at its quarter and had actually set over an hour before. Duff was acquitted, and Lincoln won the case. |