sentences:  It was initially treated with suspicion, partly because wormholes in the map and the "Relation" did not match.In spring 1958, however, Witten's friend Thomas Marston, a Yale librarian, acquired from London book dealer Irving Davis a dilapidated medieval copy of books 21-24 of Vincent of Beauvais's encyclopedic "Speculum historiale" ("Historical Mirror"), written in two columns on a mix of parchment and paper sheets, with initial capitals left blank, which turned out to be the missing link; the wormholes showing that it had formerly had the map at its beginning and the "Relation" at its end.All traces of former ownership marks, except for a small part of a bright pink stamp which overlapped the writing on folio 223 of the "Speculum", had been removed, perhaps to avoid tax liability for the former owner (although as historian Kirsten Seaver noted many years later, stamps on random book pages indicate institutional, not private ownership).