Bale's Mage Tower, in the main hall on the first floor.
...
"Four scrolls, five scrolls, four scrolls… Zach, why did you only submit three scrolls?" asked Warwick, staring at the simple and honest apprentice in front of him while massaging his temple.
"I had rotten luck yesterday. I made the same mistake three times in a row, so I dared not continue after that."
In the process of magic scroll preparation, making a series of mistakes was a sign exhaustion. That meant that one's focus was no longer sustainable. When this happened, the best thing to do was to put down the quill and take a rest. If you were to force yourself to go on working, dangerous accidents were likely to happen.
This was a valuable lesson passed down from generation to generation. In magic, one must take every precaution because recklessness was the main cause of accidents.
