glass
(he, him)
ARandomGod said:IMC? You'd still have them even when the Periapt was stolen. If you didn't catch the thief until day 2 you wouldn't have them that day, however. But on Day 3, after sleeping with you precious, you'd get them back.
That would be my ruling as well. The rules don't require you to specify which spells are your bonus spells, so loosing them would be impracticle.
Or course, if your wisdom dropped far enough (below 10+spell lvl) they some spells might become unavailable for other reasons.
glass.