Arthur
... that Arthur and Mary Sellwood had the idea for a book on Victorian railway murders in the 1940s, but did not write it until after a "violent incident on a night train" in the 1970s?
... that <b id="mwA0w"><a href="./Arthur_V._Sellwood" id="mwA00" rel="mw:WikiLink" title="Arthur V. Sellwood">Arthur</a></b> and Mary Sellwood had the idea for a book <i id="mwA04">(cover shown)</i> on Victorian railway murders in the 1940s, but did not write it until after a "violent incident on a night train" in the 1970s?