"Two!" he said, and his voice sounded hoarse from inward emotion.

"The Doctor handed a third book, again spiritual Latin hymns with notes. The fourth, a Latin Psalter. The Professor held out his hand, and it trembled.

"Is there more?" he exclaimed.

The Doctor's voice sounded hollow from the cave.

"There is nothing more."

"Look carefully," said the Professor, with faltering voice.

"Here is the last," cried the Doctor, handing out small square board, "and here another."

They were two book-covers of solid wood, the outside ornamented with carved ivory. The Professor perceived at once from the style of the figures that it was Byzantine work of the latest Roman period--the figure of an Emperor on a throne, and over him an angel with a halo.

"A large quarto of the fifth or sixth century. It is the cover of the manuscript, Fritz; where is the text?"

"There is no text to be found," again replied the sepulchral voice of the Doctor.