Olin Library's newest resident is looking for a good book to sink his tusk into. The skull of a one-toothed walrus, which was installed in the Campbell Reading Room on Jan. 20, is the University's latest exhibit on display from the former Museum of Wesleyan University (1871–1957). The piece was donated to Wesleyan 145 years ago by the Smithsonian National Museum of Natural History but has spent about half of its university life in storage. The 26-pound skull, which is missing its right tusk, belonged to a Pacific walrus (Odobenus rosmarus divergens) living along the Ugashik River in Alaska in…