[Now you notice, Bill. IT'S YOUR FAULT, Y'KNOW. Some friend!!! But he'll look back at you anyway to answer your question.]

Yes, more or less. While using symbology normally causes mental fatigue, here it's as though that side effect has been amplified. Though there does not seem to be a hard number limit on how many times I can cast, I tire much more quickly than I would under normal circumstances. [Like...a nap sounds really good right now, honestly. He might go back to the hotel and do that once they're done here. He definitely can't finish his sword training in this state.] And it would seem something similar is rue of Alisha's abilities as well...