“I remember that morning before the change very vividly. I must have gone up Great Portland Street. I remember the barracks in Albany Street, and the horse soldiers coming out, and at last I found the summit of Primrose Hill. It was a sunny day in January⁠—one of those sunny, frosty days that came before the snow this year. My weary brain tried to formulate the position, to plot out a plan of action.

“I was surprised to find, now that my prize was within my grasp, how inconclusive its attainment seemed. As a matter of fact I was worked out; the intense stress of nearly four years’ continuous work left me incapable of any strength of feeling. I was apathetic, and I tried in vain to recover the enthusiasm of my first inquiries, the passion of discovery that had enabled me to compass even the downfall of my father’s grey hairs. Nothing seemed to matter. I saw pretty clearly this was a transient mood, due to overwork and want of sleep, and that either by drugs or rest it would be possible to recover my energies.