‘concealing’ historical pictures (exact matches)

Incas hiding their gold from the Spanish Conquistadors
Incas hiding their gold from the Spanish Conquistadors
Blue Jays in Winter, study for book Concealing Colouration in the Animal Kingdom
Blue Jays in Winter, study for book Concealing Colouration in the Animal Kingdom
White Birch Leaf Edge Caterpillar, study for book Concealing Colouration in the Animal Kingdom
White Birch Leaf Edge Caterpillar, study for book Concealing Colouration in the Animal Kingdom
Earth and Air
Earth and Air