 Rivers of Time

Rivers of Time is a 1993 collection of science fiction short stories by American writer L. Sprague de Camp, first published in paperback by Baen Books.All but two of the pieces were originally published between 1956 and 1993 in the magazines "Galaxy", "The Magazine of Fantasy & Science Fiction", "Analog", and "Asimov's Science Fiction", and the Robert Silverberg-edited anthology "The Ultimate Dinosaur".