Related על מגילה 4:1

One who read [the Megillah] at night did not fulfill his obligation. Said Rabbi Yosei, it so happened with Rabbi Yochanan ben Nuri that he read [the Megillah] in Sepphoris at night. They said to him, a time of danger (i.e., of persecution) is not a proof. One who recited [the Megillah] by memory did not fulfill his obligation. Said Rabbi Shimon ben Elazar, it so happened with Rabbi Meir that he went to Asia Minor to pass the year and he did not find a Megillah there written in Hebrew. So he wrote it from memory and he went back and read from it. One who read [the Megillah], whether standing, whether sitting, whether lying down, whether he appointed a[n Aramaic] translator, whether he made a blessing before [reading] it, or whether he made a blessing afterwards, [or whether he made a blessing] afterwards and did not make a blessing beforehand, or whether he did not make a blessing either beforehand or afterwards -- he has fulfilled [his obligation]. Said Rabbi Shimon, it so happened with Rabbi Meir that he read [the Megillah] in the synagogue in Tibin sitting down, and the congregation was sitting down, and as soon as he finished part of it, he gave it to someone else and he (i.e., the other person) blessed over it.