His inquiries related chiefly to scientific matters, with the later progress of which, as applied to the practical purposes of life, he was almost wholly unacquainted. No student of science myself, I replied as well as my slight information permitted; but the task was far from easy, and I was much relieved when, passing from interrogation to discussion, he began pouring forth his own conclusions upon the facts which I had been attempting to place before him. He talked, and I listened spellbound. He talked till I believe he almost forgot my presence, and only thought aloud. I had never heard anything like it then; I have never heard anything like it since. Familiar with all systems of all philosophies, subtle in analysis, bold in generalisation, he poured forth his thoughts in an uninterrupted stream, and, still leaning forward in the same moody attitude with his eyes fixed upon the fire, wandered from topic to topic, from speculation to speculation, like an inspired dreamer.