Gathering for Gardner 9 (G4G9) Gift Exchange Archive. 2010. A collection of ephemera, gifts, notes, and memorabilia from the eighth invitation-only conference celebrating the intersectional interests of Martin Gardner, including mathematics, puzzles, science, logic, magic, games, and more. Among the objects included are a Nonahedra from Norton Starr, Wormhole by George W. Hart, Mathematical Balloon Twisting by Vi Hart, Business Card Menagerie by Lambert Bright, Perplexing Puzzlers and Tantalizing Teasers by Martin Gardner, a reprint of the Vanishing Leprechaun by Elliot, Nine House Shapes for G4G9 from Saul Bobroff, The Green Northern Lights Magic by Lennart Green, and much more, including games, toys, puzzles, and printed material on all manner of Gardner-esque subjects, with many items represented in duplicate, as the collection was kept by a husband and wife who both attended the convention. Filling an oversize banker’s box, with the contents in generally good or very good condition with signs of handling and use. Additional information and photographs available on request.