If he was a scholar he lectured; but if not, scholars would lecture before him. If he was accustomed to read [Scripture], he would read; but if not, they would read to him.  And from what did they read to him? From Job, from Ezra, and from Chronicles.  Zechariah ben Kevutal says: Many times I read before him from Daniel.

If he wished to doze, young men of the priesthood snapped before him with the index finger, and they said to him, “My lord Kohen Gadol, stand up and cool off once on the floor!”  And they kept him busy until the time for slaughtering [the daily offering] arrived.