sentences:  (1990), "Dinosaurs" (1996), "" (1997), "The SFWA Grand Masters, Volume 1" (1999), "The World Turned Upside Down" (2005), and "The Best Time Travel Stories of the 20th Century" (2005), as well as such collections of de Camp's work as "A Gun for Dinosaur and Other Imaginative Tales" (1963), "The Best of L. Sprague de Camp" (1978), "Rivers of Time" (1993), and "" (2005).It has been translated into French, German, Italian, Czech, Dutch, and Spanish, and adapted into radio and comic book form.The story takes the form of a first-person narrative by the protagonist, time-traveling hunter Reginald Rivers, told to Mr. Seligman, a prospective client of his time safari business; Seligman's contributions to the conversation are omitted, and must be inferred from those of Rivers.