54. University of Pennsylvania, Ms. Coll 390, Item 1139 Title: Aparokṣānubhūti Author: Ādi Shankara Date: circa 1700-1850.
60. University of Pennsylvania, Ms. Coll 390, Item 1120 Title: Pañcīkaraṇa Author: Ādi Shankara Date: circa 1700-1850.