Elsewhen (1941) is a science fiction novella by American writer Robert A. Heinlein, concerning time travel and parallel universes.
The story concerns five (originally four) diverse students who attend a philosophy seminar.
The professor, Arthur Frost, explains that he learned how to use his mind to go back in time and correct a bad mistake in his life.
He is distraught at the disappearances, but the professor assures him that they all received a hypnotic suggestion to come back in two hours.
Eventually she arrived in a place with an extra spatial dimension; there she realized she could see inside solid objects.
He has changed physically, having a shorter, stockier body; with this, and with his peaked hood, he calls to mind a gnome.
Jenkins watches him disappear, so that he would start believing in this possibility, and be eventually able to travel between timelines.
Frost arrives on a Flash Gordon–like planet, and finds Estelle to be a priestess with the name Star Light.
Frost returns to the original timeline and is arrested on suspicion of kidnapping and possibly murdering his students.
Frost escorts Jenkins back to Estelle's timeline, and he decides to settle there.