It only remains now for me to thank my cousin and life-long friend, John Taylor Brown, the author of the tract on "St. Paul's Thorn in the Flesh." I am sure my readers will thank me not less heartily than I now do him. The theory that the thorn of the great apostle was an affection of the eyes is not new; it will be found in "Hannah More's Life," and in "Conybeare and Howson;" but his argument and his whole treatment, I have reason to believe, from my father and other competent judges, is thoroughly original; it is an exquisite monograph, and to me most instructive and striking. Every one will ask why such a man has not written more--a question my fastidious friend will find is easier asked than answered.
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This Preface was written, and I had a proof r