Sherlock Holmes tries to recover blackmail letters leading to a confrontation with the Napoleon of Crime-Professor Moriarty.Original Air Date: September 25, 1938Support the show monthly at patreon.greatdetectives.netSupport the show on a one-time basis at http://support.greatdetectives.net.Mail a donation to: Adam Graham, PO Box 15913, Boise, Idaho 83715Take the listener survey…http://survey.greatdetectives.netGive us a call 208-991-4783Become one of ourfriends on Facebook.Follow us on Instagram at http://instagram.com/greatdetectivesFollow us on Twitter@radiodetectives