This unusual anonymous set of staples sheets explores a method of magically working out a spectator's birthdate. I can't find an author for this, but it is interesting nonetheless.  
 
Condition: Very good, some minor wear, pencil annotations and some of the printing has transferred between sheets.
 
Binding: Staples sheets.
Year: c.2000
Publisher: Unknown
Pages: 7
Dimensions (to nearest cm):  21 X 15cm