But first of all she must study geology, and especially the history of the extinct races of animals-their natures, their habits, their loves, their hates, their revenges. She must " "Hold, h-o-o-old!" roared Hum-Drum. "It is certainly my turn now. My rooted and insubvertible conviction is, that the causes of the anomalies evident in the princess's condition are strictly and solely physical.