found: Die Chronik Fredegars und der Frankenkönige ... 1888:t.p. (Dr. Otto Abel)
found: OCLC, 4/4/96(hdg.: Abel, Otto, 1824-1854)
found: His Die deutschen Personen-Namen, 1889:title page (H. F. Otto Abel)
found: Deutsche Nationalbibliothek online, June 26, 2014(access point: Abel, Otto; other access points: Abel, Ottonius; Abel, O.; Abela, O.; Abel, Heinrich Friedrich Otto (full name); Abel, Heinrich Friedrich; Abel Heinrich F.; Abel, H. F. Otto; dates 1824-1854, born in Klosterreichenbach; historian)
found: German Wikipedia, June 26, 2014:"Otto Abel (Historiker)" (Heinrich Friedrich Otto Abel; born Jan. 22, 1824 in Klosterreichenbach [named Reichenbach in 1824; renamed Klosterreichenbach in 1897; part of the community of Baiersbronn, 1974]; died Oct. 28, 1854 in Leonberg; German historian; studied at U. Tübingen, Jena, Heidelberg, Bonn and Berlin in history; enthusiastic about the revolution of 1848, but disappointed by the outcome; entered Prussian diplomatic service, but resigned in 1850; settled in Berlin and became a participant with the Monumenta Germaniae Historica; habilitation 1851 as a docent in Bonn; died in Leonberg of Brustleiden (pulmonary or chest affection))