display of spirit. He did not seem to care whether I became a student. And
always he watched me, for what purpose I could not determine.

My home life--if existence in a studio can be so called--was merry. I was
learning the ways of the world. I liked the life. I wrote to John almost
every day. The freedom of the den, the change from rote lessons to post-
graduate work was pleasant. I was happy.

Happy? I must have dreamed it.

What I thought happiness was nothing to what I now know happiness can be.



CHAPTER V.


THE FINDING OF THE BACILLUS.

If I have dwelt so long upon the laboratory and its master, it is because
there the great blessing came that has glorified my whole existence. This
was the way of it.

One day I asked Prof. Darmstetter some question about the preparation of a
microscopic slide from a bit of a frog's lung.

"Vait!" he snapped, "I vill speak vit' you aftervards."

The girls prophesied the terrible things that were to happen, as they
lingered in the cloak room, waiting their turn on the threadbare spot in