Here, in present day Cambodia, Mahayana Buddhism, and some degree of Vajrayana (still under academic scrutiny), is no longer widely practiced as it seems to have been around the 9th through 12th centuries. What has remained, somewhat indeterminably is a synthesis of Shravaka and Vajrayana-like practices, scholars now label as Southern Esoteric Buddhism. This article includes a quick digest of that esoteric Buddhism, starting with a description of The Yogāvacara (practitioner of yoga) manual. This is a Theravada Buddhist meditation manual dated approximately from the 16th to the 17th century. Interestedly, recent scholarship of Buddhist tantras reveals they were composed in stages, building from meditation manuals, with Mahayana ethical and Vajrayana soteriological content super added. Other Yogāvacara practices include: 1. “ The use of encoded language.” Vajrayana tantras are famous for secret coded instructions and scrambled mantras deciphered...