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 Psychology, and having chosen Hartley for our text-book, we raised Priestley’s edition to an extravagant price by searching through London to furnish each of us with a copy. When we had finished Hartley, we suspended our meetings; but my father’s Analysis of the Mind being published soon after, we reassembled for the purpose of reading it. With this our exercises ended. I have always dated from these conversations my own real inauguration as an original and independent thinker. It was also through them that I acquired, or very much strengthened, a mental habit to which I attribute all that I have ever done, or ever shall do, in speculation; that of never accepting half-solutions of difficulties as complete; never abandoning a puzzle, but again and again returning to it until it was cleared up; never allowing obscure corners of a subject to remain unexplored, because they did not appear important; never thinking that I perfectly understood any part of a subject until I understood the whole.

Our doings from 1825 to 1830 in the way of public speaking, filled a considerable place in my life during those years, and as they had important effects on my development, something ought to be said of them.

There was for some time in existence a society of Owenites, called the Co-operation Society, which met for weekly public discussions in Chancery Lane. In the early part of 1825, accident brought Roebuck