Two mathematical tables on large separate sheets of parchment
Parchment
Use of red and green initials, and on f.2 the top left corner a lion's head terminates the “ypotenus” line.
Unbound, in 20th century portfolio.
Written in England, early 12th century.
Found by Dr Singer in Durham Cathedral Library in February 1927, where it had clearly been hanging in a frame for some considerable time.
Yeldham, Florence A., "Fraction Tables of Hermannus Contractus", Speculum , v.3, no.2, (April 1928), 240-5.
Ker, N. R., Medieval manuscripts in British libraries, II. Abbotsford - Keele , (Oxford: Clarendon Press, 1977)