Main Fiction: “The Hounds of Tindalos” by Frank Belknap Long, Jr., first published in Weird Tales, July, 1937.
Narrator: Lewis Morgan.
“A new drug?”
“It was used centuries ago by Chinese alchemists, but it is virtually unknown in the West. It’s occult properties are amazing. With its aid and the aid of my mathematical knowledge I believe that I can go back through time.”