Despite my feeling of exhilaration, my face must have revealed something of my real state of exhaustion, for Marguerite cried in alarm at the sight of me.

"A little tired," I replied, in answer to her solicitous questions; "I have just finished my demonstration before the Chemical Staff."

"And you won?" cried Marguerite in a burst of joy. "You deceived them just as the doctor said you would. And they know you have solved the protium problem and they do not know how you did it?"

"That is correct," I said, sinking back into the cushions of the divan. "I have done all that. I came here first to tell you. You see I could not come before, all these weeks, I have had no time for sleep or anything. I would have telephoned or written but I feared it would not be safe. Did you think I was not coming again?"

"I missed you at first,--I mean at first I thought you were staying away because you did not want to see me, and then Dr. Zimmern told me what you were doing, and I understood--and waited, for I somehow knew you would come as soon as you could."

"Yes, of course you knew. Of course, I had to come--Marguerite--" But Marguerite faded before my vision. I reached out my hand for her--and it seemed to wave in empty space....

~5~

When I awoke, I was lying on a couch and a screen bedecked with cupids was standing before me. At first I thought I was alone and then I realized that I was in Marguerite's apartment and that Marguerite herself was seated on a low stool beside the couch and gazing at me out of dreamy eyes.

"How did I get here?" I asked.

"You fell asleep while you were talking, and then some one came for books, and when the bell rang I hid you with the screen."