Doctor Jenkins was a fictional character in the Dixon Hill series in a mystery novel read by Data in 2364.
Jenkins was a country Doctor in Fairbridge, Berkshire County, Massachusetts. He had put an advertisement for the sale of his practice in the A.M.A. Journal as he was retiring and planning to move to Arizona. Dr. John Rawley saw the advertisement and purchased the practice from Jenkins. (TNG: "The Big Goodbye")
This character was only mentioned in writing.
The pages seen in the episode were from the mystery novel, Dangerous Ground, by author Frances Sil Wickware. This novel was published in 1946. Information on Doctor Jenkins was from page 13.