This numbering goes back to Greek grammarians. Here is the Τέχνη Γραμματική (Art of Grammar) ascribed to Dionysius Thrax:
πρώσοπα τρία, πρῶτον, δεύτερον, τρίτον· πρῶτον μὲν ἀφ᾽ οὗ ὁ λόγος, δεύτερον δὲ πρὸς ὃν ὁ λόγος, τρίτον δὲ περὶ οὗ ὁ λόγος.
"There are three persons ['faces'], first, second, third. The first is the one from whom the speech [proceeds]...
The Wikipedia article on Tetragrammaton gives a long list of examples from Greek and Latin in early manuscripts and patristic writing. The overwhelming majority use "Lord", but a few use proper transliterations, such as Ἰαῶ in Greek and "Jaho" in Latin.
The first quote ("it does not seem to me...") can be seen here (p. 312 of the book you linked to) -- it begins 10 lines from the bottom of the first column, "mihi non videtur posse negari...". The quote as given by Laumonier is compressed from Juan de Lugo's original -- the last phrase, "what is the correct mathematical value of the object", corresponds to ...
The Roman aqueduct is considered one of the greatest inventions of the ancient world. Commenting on this technology, Cicero had the following to say:
Adde ductus aquarum, derivationes fluminum, agrorum irrigationes,
moles oppositas fluctibus, portus manu factos, quae unde sine hominum
opere habere possemus? Ex quibus multisque aliis perspicuum est, ...
The oldest Greek transcription I've found is from Diodorus of Sicily (The Library of History I.94.2):
παρὰ δὲ τοῖς Ἰουδαίοις Μωυσῆν τὸν Ἰαὼ ἐπικαλούμενον θεόν
Among the Jews, Moses [attributed his laws to] the god called "Iaō".
The oldest Latin one I've found is Pseudo-Jerome (Breviary on the Psalms 8: in this manuscript, it's on 12v-13r):
Literary evidence would do little to "debunk the myth of a white antiquity", because such evidence would only refer to a subset of statues. Diehard whiteys could claim that other statues were unpainted.
Fortunately, the scientific evidence is overwhelming, e.g.