Hoffmann, Professor, 1839-1919 · London : Frederick Warne · leaf 57
Fio. 49. disengage the keys from the lock ; no easy matter, for whenonce inserted they instantly fall crosswise in various direc-tions, each blocking the others when you endeavour toextricate them. 14 Puzzles Old and New. No. XXIII.—The Screw Box. This is a little box a couple of inches in height,… … Fig. 50. with the utmost freedom, but cannot be removed without a knowledge of the secret. No, XXIV.—The Ball and Three Strings.
Puzzles
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