4 entries in Mental Magic / Principles / Double Writing
  
Creators Title Comments & References Source Page Categories
James T. Deacy Just an Echo method to double write secretly on a prediction in envelope, confabulationRelated to The Jinx 1-50 (Issue 29) 185
Al Mann The AME Double-Writer Phanta-Graphs 7
Al Mann An Impromptu Double-Writer Phanta-Graphs 8
John Riggs A Mullica Wallet Routine prize prediction on receipt in wallet The Magic of John Riggs 63