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I have written this biography of my brother for the following among other reasons: (1) because I desired to satisfy my own heart and to fulfil what I have felt to be a personal duty; (2) because I believe that the reading public will find it healthful and stimulating, even as his friends found it pleasant and profitable, to know the man (3) because the work which he did, great as it is admitted to be, cannot be fully understood apart from an acquaintance with the character and aims of the worker. My private relation to the explorer has enabled me to write of him with a full personal knowledge, but I recognise the fact that there are various aspects of his life — work upon which the public will naturally desire the opinion of experts. Fortunately, he numbered among his friends men who can speak with the highest authority in every department, and I have been happy in receiving contributions from them which enable me to present to the reader an estimate practically complete.
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