6-4: hijos: children.
6-5: voy de vuelta: I am returning.
6-6: cómo he de perder: how am I to suffer the loss? Cf. note había de conocer, p. 3, 4.
6-7: no seas: don't be. Observe that the imperative is never used negatively, being then replaced by the subjunctive.
7-1: Alicante: a port on the eastern coast of Spain.