From MagicPedia

Robert Hummer.

An eccentric magician who invented some very good tricks like the Whirling Card.

[edit] Books

• Half-a-Dozen Hummers (1940)
• Six More Hummers (1941)
• Six Tricks for 1944
• Face-up, Face-down Mysteries (1946)

[edit] Marketed Tricks

• Hummer's Great Discovery (1940)
• Fantastric (1941)
• Poker Chip Mystery (1941)
• Hummer's Whirling Card (1943)
• Hummer's Magic Carpet (1949)
• Mathematical 3-Card Monte (1951)