The Depths of Despair

Walkthrough
Speak to Lord Kandur Hosidius in the house on the eastern shore of Hosidius region. Lord Kandur Hosidius seeks help in finding his missing son Artur.

Find Chef Olivia on the ground floor in the kitchens of the Lord's house. Olivia reveals that Artur was looking for the Accord of Twill in the Arceuus library before he went missing.

Travel to the Arceuus House Library and speak to Galana (northeastern segment on the ground floor). She will suggest you find a book called Varlamore envoy, whose location is random for each player. Ask her where it is and search the bookcases in that area until you find it.

-Read the book (just open it and flip through the pages) and then head to the Crabclaw Caves (NOT Crabclaw Isle) on the south-southeastern coast of Kourend (south of the Woodcutting Guild). (If you don't read the book a message saying "You have no reason to go in there." will appear in the chat when you try to enter the Crabclaw Caves.)

- Follow the path east, south, then west through the caves to find a well. Climb down to find Artur. Kill the Sand Snake, search the chest, talk to him again, then return to the quest starting point. Use Xeric's talisman if available. If you don't have it, and have less than 40 Agility to use the river shortcut in Hosidius, it is faster to go back to Port Sarim then sail to Kourend to save some time walking.