This item was obtained from The Rookie Guard Quest, located on the island of Rookgaard.
Your reward is Experience Points, 350 gps, Studded Shield, Saber, 7 Small Health Potion, Star Ring, Brass Helmet, Studded Armor, Leather Boots, Garlic Necklace, Silver Amulet, Sword, Brass Shield, Pick, Small Ruby, 30 Eggs , 10 Brown Mushrooms.
During mission 6 "Attack":
"Returning to Vascalir, he will tell you that the Trolls managed to dig a tunnel to invade and set fire to the library vault. You need to go down there and save an important book on Orc Language from the ashes. Descend north of Vascalir and head north, east and west until you see a single staircase. Go down, go around the aquarium containing the Blood Crab and enter the door that leads to the library stairs. Remember to have a reasonable amount of HP, as you will cough a lot in the fire and this will cause you to lose some hitpoints. In the north of the library there will be the chest, and a special Destroy Field Rune on a table. Use the rune on the fire to weaken it and use the chest to recover the book. Come back, say: hi, yes to Vascalir and he will give you 100 experience points."