This ritual text follows the Darśapaurṇamāsa section of Baudhāyana’s Śrautasūtra, it focusing on the atonement rites (prāyaścitta) performed during the new moon and full moon. It explains how to properly conduct these rites with mantras, step by step. The text also mentions the Prāyaścitta-candrikā, a Dharmaśāstra text (f. 12a). (Written in 10 lines per leaf.; 27 leaves foliated 1-27, upper left and lower right verso. Manuscript is part of a group of manuscripts written by or under the direction of Sadāśiva, along with Ms. Coll. 390, Item 1279, Item 1280, Item 1281, Item 1282, Item 1283, Item 1284, Item 1285, Item 1286, Item 1287, Item 1288, Item 1289, Item 1292, Item 1293, Item 1294, Item 1295, Item 1296, Item 1297, Item 1298, Item 1299, and Item 1300. Although no scribe is named, the manuscript is written on the same paper, in the same style, and on the same general subject (performing Vedic rites and ceremonies) as the other manuscripts in the group.; Written between 1805 and 1814, based on dates from other manuscripts written by or under the direction of Sadāśiva.; Mistakes blacked out; some minor corrections and additions in margins; vertical margins marked with double black line.)