William Dwight Whitney was an editor on Webster's Dictionary and a founding member of the American Philological Association. Principally a scholar of Sanskrit, he was a known expert on comparative linguistics. This paper examines Bahtlingk's edition of the two longest of the ancient or genuine Hindu Upanishads, the Chandogya and the Brhad-Aranyaka. This review provides a companion piece to these two works of Vedic literature and is of interest to students of Sanskrit and related literature.