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.

I am stooped considerably and stand unsteadily on my legs; not that they are not strong, but the tendency of my feet to turn inward has increased, so that I walk for the most part on the outer edges. Their prehensile powers are developed, too, and they can pick up objects quite easily.

It is also interesting to note that my mental processes have not changed one whit—I can think as clearly and as deeply as ever. As I predicted, the serum does not affect the brain tissues; or, if it does, it does not keep them from functioning properly.

I have been hungry all day. The food Brock sent to me was not sufficient, especially as regards meat, and I must send up a note with the empty dishes for him to increase the amount.

June 19—This part of the experiment will stop tomorrow, for I shall then mix and administer the counter-agent.

Tonight, I see myself to be an eerie creature, half beast, half man. I am hard put to it to walk without supporting myself on the table and the backs of the chairs. So must our ancestors have looked when they swung down from the trees to achieve their first adventures on the ground and to conquer the world.