L. Frank Baum,
Aunt Jane's Nieces on the Ranch…
(1913)
“ But they found little more than Mildred had done during her first exploration, and the men who were testing the wall met with no encouragement at all. Aside from the two cleverly constructed openings—one into the nursery and one into the garden—the blocks which composed the wall seemed every one solid and immovable and resisted every attempt to wrest them from their places.After more than two hours of industry, during which every man believed he had examined every block, they were forced to abandon the lower chamber and ascend the steep stairs to the upper one. ”
