• Detail of a diagram showing the phases of the moon, illustrating Johannes de Sacro Bosco's Computus., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Detail of a decorated initial 'O'(mnia) at the beginning of Johannes de Sacro Bosco's Algorismus., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Detail of circular diagram, illustrating Johannes de Sacro Bosco's Computus., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Added notes on mathenatical matters., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Puzzle initial 'M'(inuciaru[m]) with pen-flourishing developing into a 'J-border', at the beginning of a treatise on vulgar fractions attributed to Johannes Anglicus., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Detail of a puzzle initial 'M'(inuciaru[m]) with pen-flourishing developing into a 'J-border', at the beginning of a treatise on vulgar fractions attributed to Robertus Anglicus., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Detail of an illuminated initial 'G'(eometrie), at the beginning of Robertus Anglicus' Tractatus quadrantis veteris., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Drawing of a quadrant, illustrating Robertus Anglicus' Tractatus quadrantis veteris., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Illuminated initial 'D'(icto) in Robertus Anglicus' Tractatus quadrantis veteris., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Drawings and diagrams illustrating Robertus Anglicus' Tractatus quadrantis veteris. Added drawing of tower in the margin (?15th century)., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Drawings and diagrams at the end of Robertus Anglicus' Tractatus quadrantis veteris., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Table in Robertus Anglicus' Tractatus quadrantis veteris., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Statement as to the time of the vernal equinox in the year 1293., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Detail of a decorated initial 'I'(ntencio) at the beginning of Robert Grosseteste's De sphaera., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Detail of an astronomical diagram illustrating Robert Grosseteste's De sphaera., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Detail of a decorated initial 'I'(ntencio) at the beginning of Robert Grosseteste's De sphaera., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Detail of an astronomical diagram showing an eclipse of the moon, illustrating Robert Grosseteste's De sphaera., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Detail of an astronomical diagram showing an eclipse of the sun, illustrating Robert Grosseteste's De sphaera., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Text page with calendrical tables illustrating Robert Grosseteste's Computus correctorius., Various calendarial and computistical treatises

in red and blue with pen-flourishing in the same colours and 'J-border' extending along the text (f. 59). Smaller initials in red or blue with penwork decoration in the other colour. Paraphs in alternating red or blue. Some initials marked

• Puzzle initial 'H'(enricus) with pen-flourishing extending into the margins including birds at the beginning of the foundation charter., Cartulary of Reading abbey, imperfect

initial in colours and gold with decoration extending into the margins including blue and red pen-flourishing with birds (f. 16). Numerous large puzzle initials in red and blue with pen-flourishing in the same colours (e.g., ff. 33, 36, 47 (with