Graduale de tempore
A Latin gradual, a choir book of plainchant for the Mass, made in the mid-sixteenth century and held by a Swiss library, written for singers in church services. Its pictures show black square notation on red-ruled staves beside large illuminated initials in blue, gold, and green with flourished foliage, and a designer could take from them a lively contrast of dense black script, red rubrication, and decorative capital letters.
