Cadwell's Hovel is located northwest of the portal entrance to Coldharbour and southwest of the southern gates of Hollow City. Through a series of arches you will come to a clothes line with clothing hanging from it and two small three walled shacks. One of the shacks has Cadwell's pet Bantam Guar, Honor inside. There are several barrels and crates with items in them.
On approaching the Hovel as well as inside, you will encounter several level 44 Clannfear. They spawn regularly and often.