An excerpt from my music history textbook (next time you use sheet music or a manuscript, think of these guys!):
"The preservation of the Roman liturgy and the repertory of Gregorian chant in manuscripts— books laboriously written and copied by hand— was one of the greatest accomplishments of the monastic communities of the Middle Ages.
"Manuscript production was a routine part of monastic life. Places within the monastery were set aside as writing workshops, or scriptoria. The word scriptorium also refers to the entire group of monks who were engaged in producing a manuscript, from the novices who prepared the ink and parchment or drew lines on which music was then notated, to the skilled workers who put the finishing touches on the book’s covers. The bookmaking process extended beyond the scriptorium to the monks who toiled outside the monastery. An entire flock of sheep was needed to provide the parchment for a single book; and wild game such as deer and boar were hunted to furnish the leather used for binding the volumes…
"Trainees first had to learn how to make the letters and notes conform exactly to the style of writing that was in use at the time; there was no room for individuality."
-A History of Western Music