Carefully he deciphered them from the crushed covers.
"A History of the World: 1800-1962."
"The P-s-y-c-h-o-l-o-g-y of H-u-m-a-n Relations."
"The P-h-i-l-o-s-o-p-h-i-e-s of P-l-a-t-o, S-o-c-r-a-t-e-s, and A-r-i-s-t-o-t-l-e."
The fourth title he did not understand at all because he could not read it. He knew only one of its three words, and it made even less sense than the other titles. Quickly, he flipped through the volume for a possible hint of explanation, and there were—
Diagrams!—
Hundreds of them, and one especially beautiful one, larger than the rest—it was necessary to unfold it from the book—in color! It was obviously the only important one of the four books; the others, from what he could gather from their rather vague titles, had nothing to do with building anything—but this one, with diagrams, obviously did!
In a haste accompanied with what he knew to be too little caution, Markten's young aide hastened back the way he had come, sometimes stumbling in his anxiety to present his invaluable find to the Elder, once almost falling.
But it took only minutes until he found Markten, who was still examining the ruin on its ground level, near the large opening through which they had entered.
"Markten! Look—"