A guilty look came to his face. I was watching him as he had watched me before the great change, and when he started at my words I knew he was thinking of playing me false; his conscience must have warned him that I had read his thoughts. But he knew that my strength was greater than his and he bowed assent.
When the other girls had gone—some of them with frightened looks at me, as if mine were the devil's beauty they tell about—and when Prof. Darmstetter was ready to begin his own work, I faced him with a challenge:—
"Prof. Darmstetter, you are about to break your word."
"You are mistaken," he said; but he could not face my look.
"I am not mistaken; you are planning to try the Bacillus upon other women, and you promised that I should be first."
"And so you are! I dit not promise t'at you should be t'e only beautiful voman all your life, or ten years, or von year. You haf t'e honour of being first. It is all, and it is enough. You shall be famous by t'at. I am an old man and must sometime brint my discofery for t'e goot of t'e vorld; but first I must make experiments; I must try the Bacillus vit' a blonde voman, vit' a brunette voman, vit' a negro voman—it vill be fine to share t'e secrets of Gott and see v'at He meant to make of t'e negro."
If his enthusiasm had not run counter to my rights, I might have admired it.
"I must try it vit' a cripple," he went on, "vit' an idiot, vit' a deaf and dumb voman. I must set it difficult tasks, learn its limitations. T'en I must publish."
"You shall do nothing of the kind. You are not a very old man and I am young. I have your secret safe, and it shall not be lost to the world even if you die. I shall see that your name is coupled with the Bacillus as that of its discoverer. Do you think I care to rob you of your honours? I value them little, compared with the beauty you have given me. Think what you promised me! That I should be first! And I have had the perfect beauty only a few days and already you are planning to make it cheap and common. This injustice I will oppose with all my might, but I will be fair with you."
"Fair vit' me!" he shouted. "Vat do you mean? T'at I shall die unknown, vit' t'e greatest discofery of all time in my hands? You call t'at fair? It is not fair to me, because I haf hungered for fame as you for beauty. But t'at is not'ing; t'at is for me only, and I am not'ing. It is not fair to t'e vorld to vit'hold t'is precious gift one hour longer t'an is necessary to experiment, to try, to make sure. To keep t'is possession all to yourself vould you deny it to millions of your sisters?"