Cards Across (or Thirty Card Trick, The Flying Cards, The Ten-and-Ten Card Trick, Passe Passe Cards) is a classic plot in card magic wherein an amount of cards disappears from one pile (of cards) and reappears in a second pile. Typically, this is performed with 2 volunteers, each of which holds a pile.
- "The Multiplication of Cards while in a Spectator's Hands" by J.N. Ponsin in Nouvelle Magie Blanche Dévoilée (1853)
- "Mene, Tekel, Upharsin" by Robert-Houdin in Les Secrets de la prestidigitation et de la magie (Secrets of Conjuring and Magic) (1868), translated by Professor Hoffmann in 1878
- "To pass several cards from one person's pocket to that of another" attributed to Mdlle Patrice in The Modern Conjurer by C. Lang Neil (1903)
- Thirty Card Trick in Cyclopedia of Magic by Henry Hay (1949)
- Thirty Card Trick in Amateur Magician's Handbook by Henry Hay (1950)