You decide to trust the runes carved into the chair - you really are very tired, and don't fancy sleeping on the hard stone floor. Gratefully, you sink into the chair, and are surprised to find that it's extremely comfortable. You pull your pack off your shoulder just in time to fall into a deep, dreamless sleep.
You wake several hours later feeling fully refreshed and no longer hungry! Which is good, because someone has stolen your pack with all your food in while you slept. Cursing whoever did this, you realize that you're lucky they didn't kill you. You're also lucky that you kept the map and the moneybag in your pocket.
Anxious to be on your way and not waste any more time, you leap up and start to walk down the corridor at a brisk pace.