For example, did you know that the "earliest known punctuation--credited to
Aristophanes of Byzantium (librarian at Alexandria) around 200 BC--was a three-part system of dramatic notation (involving single points at different heights on the line) advising actors when to breathe in preparation for a long bit, or a not-so-long bit, or a relatively short bit"?
Aristarchus settled in Alexandria, where he was a pupil of
Aristophanes of Byzantium, and, about 153 BC, became chief librarian there.