Ketchum was a young doctor when he met Cayce in Hopkinsville, Kentucky. One of Ketchum's first patients was a girl named Aime Dietrich, whom Cayce had recently cured from a seemingly incurable condition. Her father, the former superintendent of schools in Hopkinsville, told Ketchum about Cayce. Ketchum asked Cayce to give him a reading for a condition that Ketchum was suffering from. Ketchum believed that it was appendicitis, but Cayce diagnosed it as a back injury that Ketchum had suffered before he met Cayce. Cayce recommended osteopathic adjustments, which cured the condition.
So, that's how Ketchum became a believer in Cayce. Cayce went on to successfully diagnose many more cases for Ketchum, which is what led to the publication of an article about Cayce in the New York Times on October 9, 1910. That article stated:
"It is well enough to add that Dr. Wesley H. Ketchum is a reputable physician of high standing and successful practice in the homeopathic school of medicine. He possesses a classical education, is by nature of a scientific turn, and is a graduate of one of the leading medical institutions of the country. He is vouched for by orthodox physicians in both Kentucky and Ohio, in both of which states he is well known. In Hopkinsville, where his home is, no physician of any school stands higher, though he is still a young man on the shady side of Dr. Osler's deadline of 40. Dr. Ketchum wishes it distinctly understood that his presentation of the subject is purely ethical, and that he attempts no explanation of what must be classed as mysterious mental phenomena."