Gerard, Antony: A Triangle of Treasures © Antony Gerard Softcover, comb-bound, 8.5x11"

Image courtesy The Mystery Emporium

Comments: Original kit included 54 card stencils, manila envelope, card index, and code card.

Contents (from web description, numbers are not page numbers):

1 The Triangle Treasures: A triple discovery, the spectators find his own marked and selected cards
2 Svengalied: A double prediction, performer predicts two freely selected cards
3 Sympathetic Reaction : two cards change places, but the marked backs do not