Besides the Buddhist and Manichaean religious texts, there were also monastery correspondence and accounts, commercial documents, caravan permits, medical and magical texts, and one love poem. In 1998 the Chinese linguist Ji Xianlin published a translation and analysis of fragments of a Tocharian Maitreyasamiti-Nataka discovered in 1974 in Yanqi. Tocharian A and B Tocharian A and B are significantly different, to the point of being mutually unintelligible. A common Proto-Tocharian language must precede the attested languages by several centuries, probably dating to the late 1st millennium BC. Tocharian A is found only in the eastern part of the Tocharian-speaking area, and all extant texts are of a religious nature. Tocharian B, however, is found throughout the range and in both religious and secular texts. As a result, it has been suggested that Tocharian A was a liturgical language, no longer spoken natively, while Tocharian B was the spoken language of the entire area. The hypothesized relationship of Tocharian A and B as liturgical and spoken forms, respectively, is sometimes compared with the relationship between Latin and the modern Romance languages, or Classical Chinese and Mandarin. However, in both of these latter cases, the liturgical language is the linguistic ancestor of the spoken language, whereas no such relationship holds between Tocharian A and B. In fact, from a phonological perspective Tocharian B is significantly more conservative than Tocharian A, and serves as the primary source for reconstructing Proto-Tocharian. Only Tocharian B preserves the following Proto-Tocharian features: stress distinctions, final vowels, diphthongs, and o vs. e distinction. In turn, the loss of final vowels in Tocharian A has led to the loss of certain Proto-Tocharian categories still found in Tocharian B, e.g. the vocative case and some of the noun, verb, and adjective declensional classes. In their declensional and conjugational endings, the two languages innovated in divergent ways, with neither clearly simpler than the other. For example, both languages show significant innovations in the present active indicative endings but in radically different ways, so that only the second-person singular ending is directly cognate between the two languages, and in most cases neither variant is directly cognate with the corresponding Proto-Indo-European (PIE) form. The agglutinative secondary case endings in the two languages likewise stem from different sources, showing parallel development of the secondary case system after the Proto-Tocharian period. Likewise, some of the verb classes show independent origins, e.g. the class II preterite,