"We'd better take a taxi to the park," said Ronald.
"What for?" cried Pollyooly, aghast at the extravagance. "There's lots of motorbuses and they'll take us there just as quickly. It's no use spending money on taxis when there are so much nicer things to spend it on."
"But I've lots of money. My grandmother gave me a five-pound note last night, and I only changed it this morning," Ronald protested.
"The thing to do is to save money, not to spend it," said Pollyooly with a solemn severity born of lessons in the school of necessity. "But if you do spend it, it's silly not to spend it on really useful or nice things."
"All right; we'll go on a 'bus," said Ronald, yielding to this cogent reasoning.
When they had settled themselves on the top of a motorbus, the Lump in Pollyooly's lap, she said: "What did your grandmother give you the five-pound note for?"
"A tip," said Ronald.
"Yes, but what did you do for it?"
"Nothing. It was a tip."
