This investigation of the 10th century minuscule Codex 1582 in the Gospel of Matthew includes a description of the physical document and an extensive evaluation of the text it contains.The manuscript was copied by the monk Ephraim, who is known to scholars in various fields.The high quality of his work and of the documents which were available to him demonstrate that he carefully reproduced an exemplar which witnessed to an ancient and valuable text.The text and marginal variants of Codex 1582 are shown to be related, though not identical, to the text of Matthew used by Origen, raising the...