The swamp was upside down, by Murray Leinster 68783 [Author: Murray Leinster] [Link: https://www.gutenberg.org/6/8/7/8/68783] [Files: 68783-0.txt; 68783-h.htm] Thanks to Greg Weeks, Mary Meehan and the Online Distributed Proofreading Team at http://www.pgdp.net Regards, Chuck