When in the Course—

"When in the Course" is a science fiction short story by American writer H. Beam Piper. It is a part of Piper's Terro-Human Future History series, and is nearly identical with his 1964 Paratime short story "Gunpowder God", which was later expanded into the novel Lord Kalvan of Otherwhen. It is most likely set in the 3rd century A.E.