This trick was sold by Davenports and other dealers. The advertisement, shown here, is from Davenports Demon Telegraph, Vol.1 No. 12 August/September 1934. The advertisement is headed ‘Ralph W. Hull’s new “Century of Progress” card act’ and gives details of the many tricks which are possible. The advertisement tells us that: ‘Old principles and new principles [are] combined in a routine that simply staggers the imagination’. Thanks are due to David Britland who provided information on this trick.
