Shamus

Shamus is a leprechaun who pops out of the tree during the Lost City quest. The player must chop a specific tree north-west of the quest starting point in the Lumbridge Swamp. When spoken to he informs the player where to find Zanaris and enter. You may find the tree easily, because it is the only tree which has a message saying "Chop tree" instead of "Chop down tree". Also, this tree is the only tree with the examine option "A commonly found tree." instead of "One of the most common trees in RuneScape.". A reference point for this tree would be the adventurers west of Lumbridge. If you go straight west from these adventurers the tree you are looking for is the closest.