Hoffmann, Professor, 1839-1919 · London : Frederick Warne · leaf 91
the forefinger and thumb ofthe right band, at the same time holding the hinder flap withthe left hand, the slit portion may be pulled down till it comesbelow the stitched line a a at back, and access may thenbe obtained through the slits to the interior. The stitchesare of such a size as just to… … Fig. 97. The reader is probably acquainted with the ordinarydagger knife, in which the blade is kept from closing by a Key to Trick or Secret Puzzles. 69 catcli on the spring, which catch drops into a notch at theback of the blade, and so holds it fast until, by the raising ofthe spring, the catch…
Puzzles
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