Sterling, Harold: The Sterling Cups and Balls Routine ©1939 (circa) Sterling Magic, MI Softcover, stapled manuscript, 8.5x11" (when unfolded), 3 pages Also available as an eBook from Trickshop.com

Image courtesy eBay seller craipont-0

Comments: Routine using three cups, four sponge balls, and six large loads. Note that if you have not performed a cups & balls routine before, some of the instructions are a little vague.

Contents (from Trickshop eBook edition, page numbers do not match original):

1 Equipment
1 Set-Up

1 Routine:
1 Introducing the Cups and Balls
1 One Cup Penetrates Another
2 Splitting a Ball
2 First Ball to Cup
2 Ball Penetrates Cup
2 Ball Penetrates Multiple Cups
3 Second Ball Joins First Under a Cup
3 Third Ball Joins the Other Two
3 Three Ball Repeat
3 Loading Three Finale Balls
4 Exposing The Three Finale Balls
4 Exposing the Last Three Finale Balls
4 Conclusion