In working on the phrase εἰς ἐπίγνωσιν τοῦ μυστηρίου τοῦ θεοῦ, Χριστοῦ in Col 2:2 (NA27 punctuation), I stumbled upon J. B. Lightfoot’s commentary on Colossians in full view, PDF format on Google Books. According to Lightfoot (239),
The “note” to which Lightfoot here refers is too lengthy conveniently to reproduce here, but it may be found on pgs. 318–19 of his commentary.