In the Dark by Edith Nesbit

It was more than a year later that I saw Haldane again. I had got rooms in the Albany by this time, and he turned up there one morning, very early indeed-before breakfast in fact. And if he looked ghastly before, he now looked almost ghostly. His face looked as though it had worn thin, like an oyster shell that has for years been cast up twice a day by the sea on a shore all pebbly. His hands were thin as bird's claws, and they trembled like caught butterflies.

I welcomed him with enthusiastic cordiality and pressed breakfast on him. This time, I decided, I would ask no questions. For I saw that none were needed. He would tell me. He intended to tell me. He had come here to tell me, and for nothing else.