During the summer of 2002 I had the opportunity to visit briefly the Temple of 'On Keru in Lhokha (Shannan), TAR, under the kind auspices of the Tibet Academy of Social Science and in collaboration with the Tibet Himalayan Digital Library project based at the University of Virginia. It was rumored, at the time, that 'On Keru—which is supposed to have been founded during the reign of the Btsan po Khri Lde gtsug btsan in the early 8th century—preserved a collection of very old manuscripts dating back to the period of the Tibetan kings of the 8th-9th centuries. Although the short time available to me was not sufficient to permit a detailed inspection of the collection—it was not possible to confirm, for example, the presence of Old Tibetan manuscripts—I was nevertheless able to identify parts of a Praj?āpāramitā collection of the 12th century. As this material is of considerable interest for the history of the Tibetan book, in terms of its material aspects including paper, ink and illumination, I will present here the information I was able to assemble. However, the manuscripts in question require more detailed study. It is my hope that this brief presentation will inspire an effort to investigate thoroughly the 'On Keru collection.