Hegel (b. 1770) is purported to have used a version of Zettelkasten, as described by Hegel's sister: "He approached his reading as follows: Everything that seemed remarkable to him he wrote on a separate sheet of paper, which he identified at the top by a general label under which the particular content had to be subsumed. In the center of the upper edge he then wrote in large letters—not infrequently using Fraktur letters—the keyword of the article. These pages he ordered alphabetically ... and thus could by means of this simple method use his excerpts at any moment. "