Calcelmo's Stone Rubbing

An item used in the quest "Hard Answers"

http://elderscrolls.wikia.com/wiki/Hard_Answers

Bug: After completing the quest, it is possible to find this item on the floor inside the halls at the Winterhold College. Once picked up, the item may trigger the quest again if you enter the Dwemer Musuem. Alternatively it may just be stuck in your inventory marked as a quest item.

Fix: Open the console by pressing ` on the PC.

Type the following code "player.drop 00033764 1" to remove the item from your inventory.