Mazes and labyrinths : a general account of their history and developments (1922)
Matthews, William Henry, 1882- · London ; New York : Longmans, Green and Co., 39 Paternoster Row, London, E.E.4 · leaf 299
h cannot be seen but are indicated on the out-side of the case. The Man is invisible during hisjourney. 205 At about the same time a somewhat similar toy wasbrought out by J. Prodor, in which, however, the travel-ling ball can be watched through the glass top, the puzzleelement in this case… … f SI j^S^JXUJ- ■™iQilic
Labyrinths
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