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.