In Oblivion, you can find a journal called "Macabre Manifest" which belonged to a grave robber. It includes:

Oford Gabings - Anvil

Travel Cloak with Silver and Green Leaf Fastener
Enchanted Shortsword with Inlaid Writing
Gold Ring with Inscription (Cursed?)
Leather Bound Travel Journal

This person is obviously a reference to Frodo Baggins (Oford Gabings is an anagram for Frodo Baggins, which further cements this reference) from Lord of the Rings. Upon completing the quest you receive a ring which looks very similar to the "Ring of Power".
Contributed by Skarro