Robert Forsythe and his wife Fiona curate elements of The Forsythe Collection. The collections are huge and include materials in three public repositories. A summary outline of the collections is here. Of the material now in public ownership or curation the largest element is The Forsythe Collection in the National Railway Museum at York's Search Engine Archive. The central theme of their collecting is the ephemera of travel and transport. A thought that is especially driven by the recognised concept of "grey literature" (printed materials with no bibliographical trace).