The Restless Ghost

Official quest description: A ghost is haunting Lumbridge graveyard. The priest of the Lumbridge church of Saradomin wants you to find out how to get rid of it.
Release date: January 2001
Start: The church in Lumbridge, to the east of Lumbridge Castle. Inside, talk to the priest.
Difficulty: *****
Length: Short
Members only: No
Requirements: The ability to fight or run away from a level 13 skeleton.
Items needed: None
Monsters to kill: Skeleton (level 13)
Spoiler warning: Plot and/or ending details follow.
Walkthrough
Father Aereck will tell you that a ghost is haunting the graveyard located near the Lumbridge chapel. He wants you to help him remove it. He requests that you speak to Father Urhney, who is located in the swamps behind Lumbridge Castle, and get some information from him on ghosts.
Go behind the castle and then keep going south in the swamps. You'll soon come upon a small house. Go inside and talk to Father Urhney. He will give you an Amulet of Ghostspeak. Now go back to the graveyard in Lumbridge.
Go into the small house with a coffin located in the Lumbridge graveyard. Open the coffin if it is not opened already, wear your Amulet of Ghostspeak and talk to the Restless ghost wandering around. He will tell you he is missing his skull and wants you to get it for him.
Head to the Wizards' Tower and go down the ladder into the basement. Search the altar and a skeleton will appear and attack you. Kill it or run, and make sure you have the skull in your inventory. Then return to the graveyard.
Use the skull with the coffin and a cutscene will show him thanking you, then flying across the River Lum. When the cutscene ends, you will have finished the quest. If you have another skull, such as a Draynor skull don't get them mixed up and destroy the unneeded and wrong one.