X-Men Legends/X-Mansion, Estate Grounds (again)

You start the chapter near the pool, at the X-Mansion. When you're done with the collectibles, start another mission in the War Room.

1 Sketchbook (on the other side of the pool) 1 Danger Room disc (Iceman Challenge, dormitories) 1 Comic Book (Subbasement, brig)
 * Collectibles