The French powder mystery, by Ellery Queen 78823 [Subtitle: A problem in deduction] [Author: Ellery Queen] [Link: https://www.gutenberg.org/ebooks/78823] note: link will be active within two hours of posting. Thanks to Greg Weeks, Mary Meehan and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) Regards, Robert