Outside the house, as he left his car, pasted over the monogram on the door, he had found another note, with the same weird mark and the single word:

"Remember!"

Much of this I had already gathered from what I overheard Dodge telling Bennett as they entered the library. Some, also, I have pieced together from the story of a servant who overheard.

At any rate, in spite of the pleadings of young Bennett, Dodge refused to take warning. In the safe in his beautifully fitted library he deposited Limpy's document in an envelope containing all the correspondence that had lead up to the final step in the discovery.

. . . . . . . .

It was late in the evening when I returned to our apartment and, not finding Kennedy there, knew that I would discover him at the laboratory.

"Craig," I cried as I burst in on him, "I've got a case for you—greater than any ever before!"

Kennedy looked up calmly from the rack of scientific instruments that surrounded him, test tubes, beakers, carefully labelled bottles.

He had been examining a piece of cloth and had laid it aside in disappointment near his magnifying glass. Just now he was watching a reaction in a series of test tubes standing on his table. He was looking dejectedly at the floor as I came in.

"Indeed?" he remarked coolly going back to the reaction.