The full King James text of John with Wesley's note printed beneath each verse, and a critical apparatus tracing his sources at the close of every chapter.
John is overwhelmingly Bengel: the famous gloss on the Logos and the readings that 'confute Sabellius' and 'confute Arius' are his, not Wesley's. Where Wesley's own hand shows is on the Calvinist battleground texts — the grace that can still be fallen from, the branch genuinely 'in the vine' — and in his sharpening of Christ's Godhead against the Socinians. Doddridge supplies the warmth.
With the series and volume introductions, the full apparatus, and indexes of sources, of Scripture cited, and of subjects.