It was possible that the magically-provided food at the feast had been harmless, but Edmund hadn't been able to bring himself to eat any of it. How long such a resolution might last if they remained much longer on the island, he didn't know, but the whole idea of it brought up years (decades) old memories that turned his stomach. He glanced aside at his younger sister. "I'm fine, Lu," he answered a different question than she'd asked, but no less relevant. He wouldn't lie to his sister, but that didn't mean he would tell her everything, either. On certain subjects, in particular.
Still there was less tension here than back at the house. As good as it was to see Caspian again (Edmund was proud of the leader his friend had become) and to hear Susan acknowledging the past again, he remained unsettled by this whole adventure. Being unsettled, had an unfortunate tendency of making Edmund grumpy around the few people who ever saw his guard down. He crouched down to examine a thorny plant. "We might see blackberries, eventually," he said aloud. "And rabbits." The question being who would claim the berries first.