"Religious text, possibly 'The learned master Bírútsáná'"

Religious text, possibly The learned master Bírútsáná: lopân bírútsáná sá sung. 190×117 mm; 75 pages, but some pages torn; handmade, oblong bookform, no cover, one quire, stitched; handmade paper; black and purple ink; scribe and date unknown; condition poor, ms incomplete, majority of pages damaged, some pages torn, ink, water and dirt stains, traces of mould; p. 39, 41 and 43 small illustrations in ink.