The Elder Scrolls IV: Oblivion Tips

Shivering Isles Potion of Feather
In Crucible of the Shivering Isles there is a building where they have a fight club at night. You can use a table there to get onto the roof. After this you can go three houses left of where the table faces the roof. (by roof of course) Then you go one house left of there and theres a house with a bunch of quills and bones on it in the middle theres a potion of feather.