Gilbert
Gilbert was sick of the guards and decided to hide in a cave near the old camp. Everyone seems to have forgotten about him. He likes cheese. You'll get some XP for finding him.
The Stranger
Series of 6 Chromanin books, each containing a hint regarding the location of the next book. The next book won't appear until you've read the previous one! The first book is found on the body of the Skeleton Mage Of The Fogtower, in the caves underneath the tower near the sea. (alternative entry: in a cave between the beach and the swamp camp) The second book is all the way up on the tower of the ruins where Ur Shak hangs out in chapter 4, south of the old camp. The third book is north of the old camp, the hint about dividing and reuniting refers to the river that splits and rejoins there. The fourth book is east of the free mine on the shore of the lake. The fifth book is near the shipwreck on the beach. The sixth book is on a corpse where you found the first book. On this corpse you'll also find 302 ore, an amulet of life force (maximum life +30) and 2 transform into bloodfly spell scrolls.
Reading each book will earn you 0, 300, 500, 700, 850 and 1000 XP respectively.
If you'd like a chance to earn some more XP, read the sixth book where you find it. If you're a wimp, leave the caves before reading it.