Passage: Ferdinand de Saussure is one of the world's most quoted linguists, which is remarkable as he himself hardly published anything during his lifetime. Even his few scientific articles are not unproblematic. Thus, for example, his publication on Lithuanian phonetics is grosso modo taken from studies by the Lithuanian researcher Friedrich Kurschat, with whom Saussure traveled through Lithuania in August 1880 for two weeks and whose (German) books Saussure had read. Saussure, who had studied some basic grammar of Lithuanian in Leipzig for one semester but was unable to speak the language, was thus dependent on Kurschat. It is also questionable to what extent the Cours itself can be traced back to Saussure (alone). Studies have shown that at least the current version and its content are more likely to have the so-called editors Charles Bally and Albert Sèchehaye as their source than Saussure himself.He taught at the École pratique des hautes études for eleven years during which he was named Chevalier de la Légion d'Honneur (Knight of the Legion of Honor). When offered a professorship in Geneva in 1892, he returned to Switzerland. Saussure lectured on Sanskrit and Indo-European at the University of Geneva for the remainder of his life. It was not until 1907 that Saussure began teaching the Course of General Linguistics, which he would offer three times, ending in the summer of 1911. He died in 1913 in Vufflens-le-Château, Vaud, Switzerland. His brothers were the linguist and Esperantist René de Saussure, and scholar of ancient Chinese astronomy, Léopold de Saussure. In turn, his son was the psychoanalyst Raymond de Saussure.

Question: What course did Saussure teach?
General Linguistics