I would also like to draw attention to high-quality scans of the five volumes of CESS published during David's lifetime that have been done by the U. of Alberta Digital Initiatives in collaboration with Archive.org.  Copyright permission to make these scans was granted by their publisher, the American Philosophical Society.
Best wishes,
Dominik Wujastyk

--
Professor Dominik Wujastyk
,

Singhmar Chair in Classical Indian Society and Polity
,

University of Alberta, Canada
.

South Asia at the U of A:
 
sas.ualberta.ca