June 16—For twenty-four hours I have had the serum in my blood. With what care I compounded it and injected it into the vein of my arm, you may well imagine. The effects were noticeable at once. My blood flowed faster and for a few moments I felt strangely light-headed, as if I had been drinking. This latter feeling passed away, and I perspired freely but felt no unpleasant sensations. Throughout the day I have taken notes on the progress of the experiment, and tonight my mirror shows me that it is a success.

The change in my appearance has not been so great as I expected, but it is very evident. I am florid and ruddy where I have generally been pale. I am far more robust and all over my body my hair has grown out, especially on the breast and shoulders and outsides of the arms—a strange condition for me, always smooth-skinned and of late years partly bald. I never felt better physically in my life, and I look, not the fine-drawn and slender scientist, but a full-bodied, really splendid savage.

In excess of well-being and in joy at the certain fulfilment of my expectations, I danced and leaped up and down this evening. Then, a little ashamed of myself, I sat down to write.

June 17—The effects of the serum are more pronounced today. Where yesterday I was but a primitive man, still decidedly human, I am today a man with a pronounced bestial look. My forehead has receded, my jaw is heavy, with sharp-pointed teeth. The change works in me every moment; I can feel it in my flesh and bones. Among other things, I am positively shaggy. The hair makes my clothes a discomfort and I have left them completely off.

I am never weary of watching my body as it changes almost before my very eyes. It is especially interesting to see how springy and flexible my joints have become, and how my feet have a tendency to turn their palms inward. This is because of the great toe, which is beginning to stand out from the others like a thumb; excellent proof that our ancestors were tree-dwellers and could get a grip with their feet.

June 18—When I awoke on my cot this morning, my first glance was toward the mirror. It was unable to recognize myself, unable to recognize even the thing I had been last night. In the broad, coarse face, with flat nose, splay nostrils, little beady eyes under beetling brows, wide mouth and brutal jaws, in the hairy, hulking body, there was no reminder of what had once been Dr. Lawlor. Some scholars would be frightened at the speed and effectiveness with which the serum has worked, but I can think of nothing save the triumph to science.