I'm surprised you should have been gulfed so easily, said Tuppence scornfully.
In a scornful tone, Tuppence said that he was not surprised of how easily the other person was gulfed.
mnli hypothesis: In a scornful tone, Tuppence said that he was not surprised of how easily the other person was gulfed. premise: I'm surprised you should have been gulfed so easily, said Tuppence scornfully.