f Ab, 1897

[4]Jack London, Before Adam, 1906——1907

[5]H. G. Wells, A Story of the Stone Age, 1897和The Grisly Folk, 1921

[6]J. H. Rosny, The Quest for Fire, 1911

[7]William Golding, The Inheritors, 1955

[8]Washington Irving, Rip Van Winkle, 1819

[9]Edward Bellamy, Looking Backward from the Year 2000, 1888

[10]H. G. Wells, The Sleeper Awakes, 1910，修订自他更早的作品《当睡者醒来时》When the Sleeper Wakes

[11]威尔斯的作品没有采用现在美国科幻行业的四类篇幅分类法（短篇、短中篇、长中篇、长篇），只是简单分为长篇和短篇，类似冈恩科幻研究中心每年颁发坎贝尔纪念奖（长篇）和斯特金纪念奖（短篇）的篇幅，大致以40000单词为分界。

[12]H. G. Wells, The Time Machine, 1895

[13]Mark Twain, A Connecticut Yankee in King Arthur’s Court, 1889

[14]L. Sprague de Camp, Lest Darkness Fall, 1939

[15]Isaac Asimov, Foundation Trilogy, 1942——1950

[16]Jack Finney, Time and Again, 1970

[17]Ray Bradbury, The Sound of Thunder, 1952

[18]A. E. van Vogt, Recruiting Station, 1942

[19]Masters of Time, 1950

[20]Poul Anderson, Time Patrol, 1955

[21]Fritz Leiber, The Big Time, 1958

[22]Alternative History, 可以理解为常说的架空历史，但更强调真实历史，而不包括“架空”一词也常涉及