Some successes are more gratifying than others. This fragment, Harvard MS Lat 100.25, contains a total of 6 damaged lines -- three on each side, in an abbreviated Gothic, edging towards bâtarde, hand. At least half the text on the recto (this side) is the text of a psalm from the vulgate, which appears in thousands of different texts.
So pinning down the exact source was not as easy as it sometimes is. It turns out to be a fragment of a 13-14th C copy of a 9th C commentary on the Rule of St Benedict, the Expositio in Regulam S. Benedicti
by Abbot Smaragdus of Saint-Mihiel. ( note to +Alys Mackyntoich
: Smaragdus is an excellent period gemstone name)