But the robin seemed to be quite satisfied and chirped and whistled back at her.

At last he spread his wings and made a darting flight to the top of a tree, where he perched and sang loudly.
That reminded Mary of the first time she had seen him.

He had been swinging on a tree-top then and she had been standing in the orchard.
Now she was on the other side of the orchard and standing in the path outside a wall--much lower down--and there was the same tree inside.
"It's in the garden no one can go into," she said to herself.

"It's the garden without a door.

He lives in there.