“What did you do after that?” asked Alleyn patiently.

Tinkerton said huffily that she followed Giggle downstairs. She remembered hearing Lord Wutherwood yell a second time. When he did that she was already some way downstairs. She joined Giggle in the car and remained there with him until the young lady came to fetch them. This came out inch by reluctant inch.

Alleyn made very careful notes, taking her over the stages of her movements several times. She seemed to be perfectly sure of her own accuracy and repeated monotonously that she had seen nobody but Giggle and Michael, as she went along the passage, through the hall, across the landing and downstairs.

“Please think very carefully,” Alleyn repeated. “You saw nobody else? You are absolutely positive?”

“Yes, sir.”

“All right,” said Alleyn, cheerfully. “And now, what did you talk about all the afternoon?” At this sudden change of tone and of tactics, Tinkerton’s air of disapproval deepened. “I really couldn’t say, sir,” she said thinly.

“You mean you don’t remember—”

“I don’t recollect.”

“But you must remember something, Tinkerton. You had a long chat with Lady Charles Lamprey’s nurse, didn’t you? It must have been a long chat, you know, because when you came out Giggle and Master Michael were playing trains and they didn’t do that until some time after your arrival. What did you and Nanny (Mrs. Burnaby, isn’t she?) discuss together?”

Tinkerton primmed her lips again and said several things were mentioned.