2https://digitalarchive.tpl.ca/internal/media/dispatcher/2165373/fullThe mystery1907Grosset & DunlapBookhttps://digitalarchive.tpl.ca/objects/365072/rdfhttps://digitalarchive.tpl.ca/internal/media/dispatcher/1922661/fullThe sign at six1912Bobbs-Merrill companyBookhttps://digitalarchive.tpl.ca/objects/245841/rdf