"The enigma of The Enchanted Pose, which depicts side-by-side female nudes, began decades ago. It is listed in the comprehensive catalog of Magritte's works, but its location had been marked as 'unknown' since 1932. Magritte, who died in 1967, never said anything about its fate." Turns out he cut it into four, painted over the pieces, and sold them as separate paintings. They were all hiding in plain sight, as it were, and the last of the missing quarters has now been identified.
Article source here:The Arts Journal