4. University of Pennsylvania, Ms. Coll 390, Item 934 Title: Māṇḍūkyopaniṣadbhāṣya Author: Ādi Shankara Date: circa 1700-1850.
9. University of Pennsylvania, Ms. Coll 390, Item 1028 Title: Taittirīyopaniṣadbhāṣyavārttika Author: Sureśvarācārya Date: circa 1700-1850.