θεοῦ διδόντος: if God had offered. The gen. abs. is equivalent to a past unfulfilled condition. For the force of the pres. participle, see G. 1255; H. 825.
ζῶντα: supplementary participle, to be distinguished from ζῶντα in 14, which also is a supplementary participle, but in indirect discourse. G. 1582, 1583, 1588; H. 982.
ἑλέσθαι ἂν τεθνάναι: in i. 6. 4, Socrates imputes this same disposition to Antiphon. Const. ἄν with ἑλέσθαι.
δήλω δ̓ ἐγενέσθην κτλ.: “their motives became manifest from their actions.”
ἀποπηδήσαντε, ἐπραττέτην: they leaped away, and were busied in. Note the change of tense.