VTG 1896 Victorian Hidden Image Illusion Puzzle Card Where Is The Pebble Toronto For Sale

This is an exceptionally rare 1896 Victorian \"Hidden Image\" optical illusion puzzle trade card titled \"Where is \'The Pebble\'?\". It was printed by Barclay, Clark & Co. in Toronto, Canada.These cards were a highly popular novelty marketing tool in the late 19th century. To the casual eye, it depicts an elegant Victorian woman sitting on a sandy beach. However, it is a visual brainteaser: if you rotate the card or inspect the shading around the woman\'s skirt, the crashing waves, and the shoreline, you will find a hidden profile of a man\'s face (the \"Pebble\").