First published in <i>Argosy</i> in 1924, &quot;The Man Who Mastered Time&quot; completes the trilogy of Ray Cummings&#39; tales of Matter, Space, and Time (&quot;The Girl in the Golden Atom&quot; and &quot;The Fire People&quot; dealing with the first two matters, respectively). The Matter, Space and Time series postulates that matter, space and time are interlinked and that one cannot exist without the others.<br />&quot;The Man Who Mastered Time&quot; is a sequel to and with the same characters as &quot;The Girl in the Golden Atom&quot;.<br /><br />&quot;The Man Who Mastered Time&quot; tells the story of Loto, a man of twenty that explains to family friends that he and his father had been experimenting two years earlier with the fluorescence in a Crookes tube when they accidently created a ray that could see through time, showing them a distant ice age future where a figure was on a sled pulled by dog-like creatures that were as big as horses. The sled stopped at a low, oval building where Loto could also see a beautiful girl; it soon became obvious that the girl was a slave or a captive and Loto vowed to save her. &nbsp;It took Loto two years but the young man had perfected a space-time machine -- an airplane of sorts -- that could move through both space and time. &nbsp;He said goodbye to his friends, climbed into the plane, and vanished...<br /><br />Ray Cummings was an American author of science fiction, rated one of the &quot;founding fathers of the science fiction pulp genre&quot;.