Darwin's was one of those open and frank minds which are entrenched behind no rampart of isolating prejudice, and elevated on no platform of conscious superiority. It was equally natural to him to ask and to give information. No one ever was more accessible to all who genuinely sought his aid in their inquiries or their projects; no one ever more truly sought information from all quarters whence truth was attainable. Hence the mass of his letters to all kinds of persons is enormous, and only a small proportion, probably, will ever be published. His letters are like his conversation, free, frank, without a trace of _arrière pensée_, praising others where possible--and no man ever found it more possible to praise others more genuinely--depreciating himself and his work most unduly. "You so overestimate the value of what I do," he writes on one occasion, "that you make me feel ashamed of myself, and wish to be worthy of such praise." Again, "You have indeed passed a most magnificent eulogium on me, and I wonder that you were not afraid of hearing 'oh, oh,' or some other sign of disapprobation. Many persons think that what I have done in science has been much overrated, and I very often think so myself, but my comfort is that I have never consciously done anything to gain applause." Here we see the scientific man occupying the highest possible moral standpoint as a seeker after truth. His election as one of the honorary members of the Physiological Society was to him a "wholly unexpected honour," and a "mark of sympathy" which pleased him in a very high degree. "Work," he writes on another occasion, "is my sole pleasure in life." "It is so much more interesting to observe than to write." So long as he could devise experiments and mark the results he continued to do it, rather than prepare his voluminous notes on many subjects for publication. "Trollope, in one of his novels, gives as a maxim of constant use by a brickmaker, 'It is dogged as does it,' and I have often and often," wrote Darwin, "thought this is a motto for every scientific worker." How faithfully he adopted it himself those who read through any one of his experimental books can appreciate. He habitually read or heard some good novel as a recreation, and took a by no means restricted interest in general literature.