Ivan T. Sanderson: An Appreciation

This document is a biographical appreciation of Ivan T. Sanderson, written by John A. Keel. It details Sanderson's life as a zoologist, author, and researcher of unexplained phenomena. Sanderson, who was trained at Cambridge, was a prolific writer and a significant figure in the study of UAP and Fortean topics. The text highlights his founding of the Society for the Investigation of the Unexplained (SITU) and his collaborative efforts with other researchers in the field. Keel provides personal anecdotes about Sanderson, including his residence in New Jersey, his work on various books such as 'Uninvited Visitors' and 'Invisible Residents', and his interest in psychic phenomena as a potential explanation for UAP. The document also notes Sanderson's death on February 19, 1973, and mentions his wife, Marion Fawcett, who continued his work. Additionally, the text touches upon Sanderson's skepticism regarding the 'Men in Black' phenomenon and his use of a magnetic UFO detector at his home, which reportedly triggered alarms in 1967-68.