Lǽden-bóc

According to the Old English Dictionary:

Lǽden-bóc

f. A Latin book :-- Nán man næfþ lédenbóca angit be fullon búton hé ðone cræft cunne no man perfectly understands Latin books, unless he know that art [grammar], Ælfc. Gr. 50; Som. 50, 65. Áwriten on lédenbócum written down in Latin books, Homl. Skt. p. 4, 48. Ða ealdan lǽces gesetton on lédonbócum, Lchdm. iii. 152, 1. læden-boc