Originally published in "Analog/Astounding Science Fiction" April 1937 Time is shaped like a spring, and one can jump from coil to coil, in these two classic stories by P. Schuyler Miller. In "Sands of Time," a time machine's inventor struggles to convince a paleontologist that the dinosaur portraits he's photographed are genuine. Would a couple of dinosaur eggs be proof enough? Or the carcass of a toothed bird? And what adventures does the traveler share when he returns from a Late Cretaceous journey bloody and beaten? The story continues in the far-flung future in "Coils of Time" where a space patrolman is pulled into a time warp to become enwrapped in a Martian war that literally spans eons. Time machines, aliens, dinosaurs, spaceships, ray guns, romance, and zombies, Miller left few tropes out when writing these now classic sci-fi tales.