Mr. Atkinson was the son of a London architect who left him an income which enabled him to devote himself to philosophy, which was his taste. He was personally conversant, as visitor or guest, with a wide range of distinguished thinkers and writers of his time. He was full of curious knowledge and notable sayings gathered in that opportune intercourse. With a mind devoid of prejudice, he looked on scientific discoveries as a veteran and seasoned spectator. No new idea surprised him, no expression of thoughtful opinion awakened in him resentment. He cared only for truth, in whatever form or quarter it appeared. He had none of the indifference of the arm-chair philosopher, but aided struggling opinion to assert itself. Once I was his guest in Boulogne. To my surprise I was the only passenger in the packet boat The quay of Boulogne was deserted. At Hughes's Hotel I was the only guest in the dining-room. On inquiring the reason, I learned that Gilbert a'Beckett had died a few days before of diphtheria, and that Douglas Jerrold had left for England since. Mr. Atkinson, not expecting me, had gone for a day's sea trip to Calais. On his return we spent pleasant hours at a cafe. He had no idea of leaving the hotel where he had rooms. Some years later Mr. Atkinson died in Boulogne, where he had resided many years. Personally he was tall, of good presence and refined manners. He was clean shaven, and might be taken for an Evangelical Bishop. Save a mobile expression, his face was as shadowless as one of Holbein's portraits. The object of his letters to Miss Martineau was to ascertain if there could be found a real basis of a science of mind. The common idea in those days was that mind was a "vital spark" which shone at will--originating without conditions--acting of its own caprice and obeying no law. Only the theological spirit could see harm in this investigation. Not only fidelity, but chivalry towards her friends was a characteristic of Miss Martineau. When W. J. Linton, for whom I had great regard, as appears in what I have written of him in the "Warpath of Opinion," had become vindictive--because I had obtained 9,000 shillings for European Freedom from readers of the _Reasoner_ at the request of Mazzini, Mr. Linton--equally desirous and equally devoted, had not succeeded--wrote to the _Liberator_ of New York, edited by Lloyd Garrison, assailing me politically and personally, whereupon Miss Martineau sent to the _Liberator_ the following generous letter--which, though it be counted egotism in me to cite, I accept the risk, since such friendship was without parallel in my experience:--