The MS that was used for the cover of Wendy's book is in fact an incomplete Nepalese MS that probably included the text of the Ratirahasya or the Anaṅgaraṅga. The surviving textual part of the MS includes passages from Purāṇas, and passages on women's temperaments.
I attach my description of the MS, which is in the Wellcome Library, London and is formally known as "Wellcome MS Indic alpha 1948". Several folios have been digitized and are available on the Wellcome's website. Go to
http://wellcomeimages.org/ and search for "Nepalese."