“Has anyone else in the house got a green dress?”

Dorcas reflected.

“Miss Cynthia has a green evening dress.”

“Light or dark green?”

“A light green, sir; a sort of chiffon, they call it.”

“Ah, that is not what I want. And nobody else has anything green?”

“No, sir—not that I know of.”

Poirot’s face did not betray a trace of whether he was disappointed or otherwise. He merely remarked:

“Good, we will leave that and pass on. Have you any reason to believe that your mistress was likely to take a sleeping powder last night?”

“Not last night, sir, I know she didn’t.”