Lafferty, R.A. "Thus We Frustrate Charlemagne"
Divergence: 778 CE
Summary: Future scientists experiment with the battle at Roncesvalles, altering their past without realizing it.
Published: In Galaxy, February 1967; World's Best Science Fiction: 1968 (eds. Donald A. Wollheim and Terry Carr), Ace 1968; Alpha 1 (ed. Robert Silverberg), Ballantine 1970; Nine Hundred Grandmothers, Ace 1970 (0441580505, 0441580513); Transformation (ed. [[editor unknown]]), Fawcett 1973; As Tomorrow Becomes Today (ed. Charles W. Sullivan), Prentice-Hall 1974 (0130500399, 0130500216); and Futures Past (eds. Jack Dann and Gardner Dozois), q.v.
Original in: English.
Translation: French as "Comment refaire Charlemagne", in Galaxie #100.
Translation: German by Gisela Stege as "So frustrieren wir Karl den Großen", in So frustrieren wir Karl den Großen, Heyne 1971 (3453062434); Die Gehaeuse der Zeit (eds. Karl Michael Armer and Wolfgang Jeschke), Heyne 1971 (3453072685); Die sechs Finger der Zeit (ed. Wolfgang Jeschke), Heyne 1975 (3453303547); and Die Fußangeln der Zeit (eds. Karl Michael Armer and Wolfgang Jeschke), Heyne 1984 (3453310195).
Translation: German by Karl H. Kosmehl as "Karl der Große, frustriert", in 900 Grossmuetter 2, Fischer 1974 (3436019216); and Schöne verkehrte Welt: Phantastische Geschichten zur Geschichte (ed. René Oth), q.v.
Translation: German by Leni Sobez as "Wir drehen am Rad der Geschichte", in SF-Stories 39 (ed. Walter Spiegl), Ullstein 1974 (3548030674).