How does the reader know Vera is pleased with the tale she told

Vera has a sense of delighted calm when she spins her final yarn: this time about Mr. Nuttel.

"I expect it was the spaniel," said the niece calmly; "he told me he had a horror of dogs. He was once hunted into a cemetery somewhere on the banks of the Ganges by a pack of pariah dogs, and had to spend the night in a newly dug grave with the creatures snarling and grinning and foaming just above him. Enough to make anyone lose their nerve."