Nearly a century has passed since Henry A. Sanders first published his editio princeps of the Washington Manuscript of the Epistles of Paul (Codex I or GA 016). Within that time, it has received very little scholarly attention. This new edition provides a fresh, conservative transcription based on two new image sets. It additionally provides comprehensive lists of variants between Codex I, Nestle-Aland 28, and Robinson Pierpont (a text that is representative of the Byzantine text of the Greek New Testament). The new edition also provides valuable data surrounding the manuscript’s provenance, character, scribal habits, textual affiliation, and substantive variants.