The full inscription is: McGill University. The Blacker Library of Zoology. Established by Robert Roe Blacker and Nellie Canfield Blacker 1920. It is now called the Blacker-Wood Library. Robert Roe Blacker was a lumberman from Michigan. He and his wife built a notable house in Pasadena, California in 1907. The story of their house and its contents is rather sad.
Bookplate (click to enlarge)