Crowned ‘King of the Ghost-Hunters’, Peter Underwood was perhaps the most prolific researcher and investigator of ghosts in the 20th century, in a career spanning over 70 years. His interest was sparked during childhood, and by the 1940s was corresponding with Harry Price, who invited him to join the Ghost Club. Underwood was involved in researching Borley Rectory, and was the last person to have interviewed everyone involved in the case. He was involved in the revival of the Ghost Club following Harry Price’s death. Underwood was a rather pragmatic ghost hunter, acknowledging that there were some instances of genuine phenomenon, but also uncovered some fakes. The most amusing, and poignant, was perhaps the man who had rigged his armchair to play ‘ghostly music’ in various rooms of his house, which had other investigators convinced. Apparently, the man was lonely and enjoyed the attention. A prolific author, Underwood wrote about 53 books and corresponded widely with others on the topic of ghosts.