We looked at the baby ducklings and swans.

And saw fresh green acorns and fir-cones that were tender and new.

There were horses and a golden hay meadow like in a storybook.

We shouted, 'Be careful. Don't fall in,' and nobody seemed to listen. But luckily nobody did fall in.

We explained about the mounting block in the stable yard where we had tea and ice-creams.

And then we shouted, 'Be careful. Don't fall off.'

We watched planes from Heathrow flying overhead so close they looked as if they might clip historic chimneys.

But we didn't go inside. Because that's pushing your luck with four-year-old friends. Who are the most delightful company in the world. Until they get bored.