DeCourcy, Ken: Leo Leslie's Triple Colour Cups and Balls ©Unkown, The Supreme Magic Co. Softcover, stapled, 6 pages

Image courtesy Lybrary.com

Comments: a cups and balls routine using red, blue and yellow balls. Aldo Colombini has a current version of this routine called "Tri-Color Cups and Balls". Available as an e-Book from Lybrary.com

Contents:

i Foreword
1 A Word About the Cups and Balls
1 Secret
2 Preparation
3 Explanation: through page 6