In the late eleventh century, Goscelin of Saint-Bertin (ca. 1040–d. after 1099) composed the most extensive collection of hagiographical writings known to have been assembled for a community of religious women in medieval England. At the behest of Abbess Ælfgifu (ca. 1037–ca. 1114) of Barking Abbey, he definitely wrote the following texts to honor the community’s three principal saints: a uita of its founder and first abbess, Æthelburh (d. after 686); Matins lessons for her immediate successor, Hildelith (d. after 716); a uita and an account of the first translation of their later tenth-century successor Wulfhild (d. after 996); Matins lessons and a longer account of the three abbess-saints’ translation on Laetare Sunday, 7 March 1092; and a report of a vision Ælfgifu received seven years after the event. This article makes the case for Goscelin’s authorship of the Matins lessons for Sts. Æthelburh and Wulfhild as well, and for their preservation in London, British Library, Cotton MS Otho A XII (Part 6). Paleographical analysis of these lessons further indicates that the scribe responsible for copying them also copied the lives of Sts. Æthelburh and Wulfhild in Dublin, Trinity College, MS 176 (E.5.28), a late eleventh-century book of Barking origin. This hand exhibits features peculiar to scribes trained in northeastern France or the Low Countries, raising the possibility that Goscelin made these copies himself. But even if he did not make them, the appearance of the same hand in texts related to Barking’s abbess-saints suggests that this scribe’s work in Otho A XII (Part 6) should be located at Barking, too, thus increasing the total number of books the community once owned to twenty-two and further proving one of the instrumental roles that religious women played during the Middle Ages to orchestrate their communities’ liturgies: commissioning writers and scribes to compose saints’ lives, Matins lessons, and other texts and music to celebrate their principal feast days with due solemnity and distinctiveness.