6 books
The Osprey, Vol. 2: An Illustrated Monthly Magazine of Popular Ornithology; September, 1897, to June, 1898 (Inclusive) (Classic Reprint)
The Osprey, Vol. 1
The Osprey, Volumes 5-6
The Osprey Volume 5-6
The Osprey Volume 3-4
The Osprey Volume 1-2