In 2015 John Davenport had the thought that the ‘hollow face’ optical illusion could be used to help promote Davenports magic museum. The prototypes were based on a rabbit in a hat which apparently turned to face you as you moved around it. Despite various options being trialled and some design work by Robin Krats in England, the idea was not taken forward. This item shows the development of John’s idea.

The Pentacle Club started issuing membership certificates in 2014. This was presented to John on 18 Feb 2014. The Pentacle Club was founded by Professor W.W. Rouse Ball as a Cambridge University society in 1919. In the 1960s it opened up its membership to include local people unconnected with the university. John Davenport joined the club as an undergraduate in the late 1960s.