Educational Toys, Inc., a subsidiary of Topper Corp., produced a set of eight Sherlock Hemlock's Hidden Answer Jigsaw Puzzles in 1971. The art was provided by Jack Davis. Each puzzle was packaged with a blue transparency "looking glass", which could be used to discover hidden letters, numbers and shapes.
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Image:Bluelookingglass.jpg |
Image:Bluelookingglass.jpg |
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Image:Sherlock-hidden3.jpg |
Image:Sherlock-hidden3.jpg |
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| − | Image:CTWSherlockHemlockCJackDavis.jpg|"The Puzzle of the Hidden C's" |
+ | Image:Sherlock-hidden2.jpg|{{center|"The Puzzle<br>of the Hidden C's"}} |
| − | Image:CTWPuzzleJackDavisStoop.jpg |
+ | Image:CTWPuzzleJackDavisStoop.jpg|{{center|"The Puzzle<br>of the Hidden Shapes"}} |
| − | Image:Sherlock-hidden2.jpg |
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