EFOREFFORT
E for Effort
E for Effort is a science-fiction novelette by T. L. Sherred, first published in 1947, about the consequences of a time viewer, a machine that projects images of the past. It has been reprinted many times, including in The Science Fiction Hall of Fame.The above text is a snippet from Wikipedia: E for Effort
and as such is available under the Creative Commons Attribution/Share-Alike License.