This is the first part of a two-part article focused on a fragmentary parchment codex, whose three extant leaves, designated in Leo Depuydt's catalogue as P.MorganLib. 265, are housed at the Morgan Library & Museum in New York. These fragments bear witness to 1 Cor 2.12–3.18; 7.16–30; 15.3–30 in the ‘classical’ variety of Fayyūmic Coptic (dialect F5). Most of these verses have been hitherto unattested in Fayyūmic and thus allow us to attain better insight into the history and text of the Coptic Bible. In the first part of this article, I discuss the codicology of P.MorganLib. 265, its linguistic features, provenance and date.