Three records of Hyginus and Pope John Second II
Newton
https://books.google.com/books?id=YsMPAAAAQAAJ&pg=PA206
In its defence, some allege. earlier writers; namely, the-first epistle of Pope Hyginus,. tile first epistle of Pope John II, the book of Idacius Clarus against Varimadus; and the book,
De unita Dietate Trinitatis, ascribed to Athanasius. .... All the epistles of Hyginus, except the beginning and the end, and the first part of the epistle of Pope John, wherein the testimony of “the Three in heaven” is cited, are nothing else than fragments of the book against Varimadus, described word by word by some forger of decretal epistles, as may appear by comparing them.
Irish Ecclesiastical Record
https://archive.org/details/irishecclesiasti04dubluoft/page/129/mode/1up
From time immemorial it was recited in
the Roman Liturgy ;* it was employed by the Fourth Lateran Council as a text of the Sacred Scripture, without any doubt or hesitation; it is put forward in the Canon Law Decretals as a dogmatic proof;3 at the period of the compilation of the spurious decretals (ninth century). it is quoted as a well-known text of Holy Writ in the letters falsely attributed to
Hyginus and John the Second ,,,
The Epistles
https://books.google.com/books?id=SuxS-z-6SIUC&pg=PA520
Et Joannes Evangelista ait: In principio erat verbuni, et verbum erat apud Deum, et Deus erat verbuni. Et iterum ipse ad Parthos:
tres sunt, inquit,
qui testimonium perhibent in terra : aqua, sanguis, et caro et tres in nobis sunt, qui testimonium perhibent in coelo Pater, Verbum, et Spiritus; et hi tres unum sunt.
Et Joannes Evangelista ait: In principio erat verbum, et verbum erat apud Deum, et Deus erat verbum (Joan. 1.) et iterum ipse ad Parthos:
Tres sunt, inquit, qui testimonium perhibent in terra, spiritus, aqua, et sanguis: et tres unum sunt. Et tres sunt qui testimonium perhibent in
coelo, Pater, verbum, et spiritus et hi tres unum sunt (Joan. v).