διὰ νήσων τὸν πλόον ἐποιεῦντο → they kept sailing through the islands
adv.
Munificently: P. φιλοδώρως. Abundantly: P. and V. ἀφθόνως (Eur., Frag.). Liberally: P. and V. ἐλευθέρως. Nobly: P. and V. γενναίως, P. μεγαλοψύχως, V. εὐγενῶς.