Pārameśvaratantra Cambridge University Library MS Add.1049.1. f. 12 of 124. "One of the oldest known dated Sanskrit manuscripts from South Asia, this specimen transmits a substantial portion of the Pārameśvaratantra, a scripture of the Śaiva Siddhānta, one of the Tantric theological schools that taught the worship of Śiva as "Supreme Lord" (the literal meaning of Parameśvara). No other manuscript of this work is known, but nine chapters are transmitted in the Prāyaścittasamuccaya of Hṛdayaśiva (see Add. 2833), where the work is referred to as the Puskaratantra or Puṣkara-Pārameśvaratantra (see Goodall 1998, particularly p. xliii). According to the colophon, it was copied in the year 252, which some scholars judge to be of the era established by the Nepalese king Aṃśuvarman (also known as Mānadeva), therefore corresponding to 828 CE."