For more than twenty years John Hannavy has been a collector of early photographic images, as well as a prolific writer on British photography--a subject he also teaches. John writes regularly for two British magazines, and to date he has had eighteen books published on the subject of photography and photographic history. John's collection was originally conceived as a broad visual history of photography for the benefit of his students, but his focus is now on cased images, especially Union cases. In fact, John believes he may have the largest private collection of Union cases in Britain. His current research interest concerns the British thermoplastic case maker, John Smith, whose cases are particular favorites in his collection.