https://thornhillkollel.com/wp-content/uploads/2016/01/shabbos-perek-yud-beis-mishna-6-if-a-person-wrote-2-letters-in-two-different-periods-of-forgetfulness-hat-is-the-halacha.mp3“shabbos perek yud beis mishna 6 if a person wrote 2 letters in two different periods of forgetfulness hat is the halacha”.