About the Author
"Hermann Oldenberg... was a German scholar of Indology, and Professor at Kiel (1898) and Gattingen (1908).
His 1881 study on Buddha, based on Pali texts, popularized Buddhism and have remained continuously in print since their first publication. With T. W. Rhys Davids, he edited and translated into English three volumes of Vinaya texts, as two volumes of the Grhyasutras and two volumes of Vedic hymns on his own account, in the monumental Sacred Books of the East series edited by Max Muller. With his Prolegomena (1888), Oldenberg laid the groundwork to the philological study of the Rigveda." (Quote from wikipedia.org)