In 1882 he earned his doctorate from the
University of Vienna, and was awarded the
sub auspiciis Imperatoris (under the auspices of the Emperor). In 1885 he continued his education at the
University of Bonn with
Hermann Usener (1834–1905) and
Franz Bücheler (1837–1908), and from 1885 to 1887 undertook study trips to France, England, Switzerland and Italy. From 1890 to 1893 he was a high school teacher in Vienna, and afterwards lectured at the University of Vienna, where in 1899 he became a full professor. In his studies, Hauler discovered a number of valuable literary fragments by classical authors. In 1886, he published
Neue Bruchstücke zu Sallusts Historien as a result of his discovery of fragments containing the histories of
Sallust. He also uncovered new fragments by the dramatist
Menander and the poet
Sotades. In 1900 he deciphered and published the
Verona Palimpsest, which includes fragmentary
Latin versions of the
Didascalia Apostolorum,
Apostolic Church-Ordinance and
Apostolic Tradition. Beginning in 1897, he spent many years studying the
Marcus Cornelius Fronto palimpsest, on which he authored over fifty articles. In 1899 he became editor of the magazines "
Wiener Studien" and "
Zeitschrift für die österreichischen Gymnasien". From 1925 until his death in 1941, Hauler was chairman of the Vienna "
Corpus Scriptorum Ecclesiasticorum Latinorum" (CSEL). == Selected works ==