The history of science was making fast, and I was interested in a thousand subjects.

Why, there was my theory of the hydrolysis of casein by trypsin, which Professor Walters had been carrying out in his laboratory.
Also, Professor Schleimer had similarly been collaborating with me in the detection of phytosterol in mixtures of animal and vegetable fats.

The work surely was going on, but with what results?
The very thought of all this activity just beyond the prison walls and in which I could take no part, of which I was never even to hear, was maddening.

And in the meantime I lay there on my cell floor and played games with house-flies.
And yet all was not silence in solitary.

Early in my confinement I used to hear, at irregular intervals, faint, low tappings.