Sentence:  "Look," said Bobbie, "I've made the nest all right again. Give me the bit of stick to mark your initial name on it. But how can you? Your letter and Peter's are the same. P. for Peter, P. for <WSD>Phyllis</WSD>." "I put F. for <WSD>Phyllis</WSD>," said the child of that name. "That's how it sounds. The swallows wouldn't spell <WSD>Phyllis</WSD> with a P., I'm certain-sure." 
Meaning of the word marked with <WSD> tags:  (from=Ancient Greek) derived from the mythological character.