Translations of and commentaries on Upanishads other than the Isha Upanishad.

The volume is divided into two parts: (1) translations of and commentaries on the Kena, Katha and Mundaka Upanishads and some "Readings in the Taittiriya Upanishad"; (2) early translations of the Prashna, Mandukya, Aitareya and Taittariya Upanishads; incomplete translations of and commentaries on other Upanishads and Vedantic texts; and incomplete and fragmentary writings on the Upanishads and Vedanta in general. The writings in the first part were published by Sir Aurobindo during his lifetime; those in the second part were transcribed from his manuscripts after his passing.