Complete Works of Euclid, Vol. 2 (Elements V-IX)

p. 334, 19: ἔστω] ἔσται q.
22: εἰσι q.
23: Γ] on erasure by the first hand b.
τόν] om. bq.
24: τόν] om. bq.
p. 336, 8: Δ] from a correction by a recent hand b.
δή] δέ b; om. q.¹⁾
10: γὰρ οἱ] γὰρ ὁ b.
ὅμοιοι] ἄρα ὅμοιοι bq.
11: εἰσι q.
12: μεταξύ] at this word q ends on fol. 165^v; leaves missing in margin; begins again p. 372, 15, see note (leaves missing in margin here, fol. 166^r).
p. 338, 5: τετράγωνοι] τεταραγμένοι b.
22: Ε] from a correction by a recent hand b.
25: ὅπερ ἔδει δεῖξαι] om. b.

p. 340, 9: Α] from a correction by a recent hand b.
10: πεποίηκε b.
14: δέ] om. b.
17: τῶν] corrected from τόν by a recent hand b.
19: ὅπερ ἔδει δεῖξαι] om. b.
p. 342, 4: ἀριθμοί] om. b.
5: ἔστωσαν — 6: ποιείτω] δύο γὰρ ἀριθμοὶ οἱ Α, Β πρὸς (changed to πολλαπλασιάσαντες by a recent hand) ἀλλήλους τετράγωνον τὸν Γ ποιείτωσαν b.
11: ἔστιν ἄρα] om. b.
12: τόν] twice om. b.
14: ἐμπίπτει] ἐμπίπτει ἀριθμός b.
17: ἐάν — ἐμπίπτῃ] om. b; of which numbers one falls as a mean proportional in margin by a recent hand.
18: οἱ ἄρα] ἄρα οἱ b.

1. Therefore δή should be deleted along with P, as I had suspected.