Manuscript transcribed by Jose Maria Na and Jose Secundino Na of Teabo, Yucatán. The first p. 30 is signed by Jose Secundino Na and dated December 18, 1857. The final pages are signed by Jose Maria Nah and dated August 5, 1863. The manuscript is divided into 2 parts: pages 1-30 constitute a liturgical calendar for an unspecified year, includes calendar count, with ancient daynames, a section on astronomy; p. 30-53 are concerned with diseases and their cures. Page 1 is the seating of January; p. 2 is a correlation of the Gregorian calendar with the Maya months of an unspecified year; p. 3-14 correlates each day of the Gregorian year with the days of the Mayan tzolkin (there are no numbers with the Mayan days); the saint is given for each day, and up to p. 6, it is indicated whether the day has a good omen or bad. Pages 15-30 concern the signs of the zodiac, indicating the significance of the births under particular signs, and the advantages of burning, fields, etc. This portion of the book was composed in 1857. Pages 30-53 are "Libro u tial acob" (book for curing), composed in 1863. The remaining pages, from p. 54 to the end, are later entries concerning sporadic births and deaths in the Na family in Teabo in a mixture of Maya and Spanish; the final pages are upside down. Manuscript divisions/headings are written in Spanish. The latest date is 1896.