Four leaves from an antiphonal with neumes

FOUR VERY EARLY ILLUMINATED VELLUM MANUSCRIPT LEAVES, FROM AN ANTIPHONARY IN LATIN WITH NEUMES. PART OF THE TEXT FROM THE FEAST OF ST. AGATHA. (Germany[?], 12th century, probably before 1150) 11 x 7 1/2." Single column, 20 lines of text with neumes in a pleasing romanesque hand. Rubrics in red capitals, one-, two- and three-line capitals in brown or red. Recovered from bindings, so a bit darkened, somewhat stained in places, and peppered with very many small round wormholes; nevertheless, all but one page entirely legible (and the sense of the text on that page only slightly compromised). As in the previous two items, the neumes here are "in camp aperto" and adiastematic. Among the texts included on these four leaves are antiphons and responsories for Matins on the feast of the Purification (2 February), antiphons for the feast of Saint Agatha (5 February), and antiphons for the ninth, 10th, and 11th Sundays after Pentecost." Antiphonary, from the Feast of St. Agatha