"I am 77 years old, employed as commercial salesman by one of the largest manufacturing companies of its kind in the world, and command a good salary and the confidence of my employers. Since my operation at Dr. Brinkley's hospital I am now their free lance salesman, opening up new territory and making good money. Any doubting Thomas may send me a self-addressed envelope if he questions the genuineness of what I say here about myself, and I will take time to answer him. First, the operation is absolutely painless. For a number of years I was a martyr to Sciatica and Muscular Rheumatism. I used every Patent Medicine I could hear of, besides Osteopathy and Chiropractic, and innumerable prescriptions from physicians, and received no benefit at all. The sciatic trouble was bad enough, but to this you must add loss of memory, hydrocele, kidney trouble, constipation, no appetite, and insomnia. Most nights two hours sleep was the most I could get, for the pains were incessant. I read in ... the +Kansas City Post+ last Spring about Dr. Brinkley's Goat-Gland operation, and decided to try it right away. I was in such misery I would have tried +anything+. Now I want to tell you, in the fewest words, that the amazing truth is that I have not had a twinge of pain of any kind at all since the operation, and have only a memory of my former suffering. This is a marvelous thing. I have the feeling of a youth. Whenever you want to hear from me I will write again and tell you what changes have taken place in me as the result of this operation. If I was asked to put a cash value upon the operation in my own case I could not do it, but I can say that all I possess in cash would be a poor equivalent for the difference the operation has made in my life. What is the difference in cash value between a life that is worth living and one that is constant misery? I don't know how you would fix that value, but that is the difference the operation has made in me. S. H. ERNST." Dr. Brinkley has kept in close touch with Mr. Ernst, and received other letters, not for publication, in which the old gentleman went frankly into details of the change that had been wrought in him by the operation in the matter of astonishing sexual vigor. For obvious reasons such details, while of the greatest scientific interest, cannot be more than hinted at in a book, and we must content ourselves with the acceptance of the fact as a fact of interest to science, to Dr. Brinkley, to the world of aged men at our doors, and to Mr. Ernst particularly, rejoicing in his new-found vigor.