He kept his eyes on her face, taking note of the fluctuating colour in her cheeks, the frightened, wary look in her eyes that told plainly of indecision.
"Why, no, I - I don't think so!"
"You did not, by any chance, see him last night?"
"Last night?" Helen repeated. "Of course not! Whatever made you think I might have?"
"I have reason to think that some woman visited him yesterday evening."
"Good gracious, why should it be me, I wonder!"
He said in his quiet way: "Please don't misunderstand me, Mrs. North. I am quite prepared to find that the woman was not you. Indeed, I'm sorry to be obliged to worry you with these questions. But I'm sure you'll realise that the presence of a woman at Greystones last night must be investigated, for it is just possible that she, whoever she is, may be able to throw a little light on the murder."
"How?" she said quickly.
"She may, quite unwittingly, have seen the murderer."
"Oh!" she exclaimed, shuddering. "But it's preposterous to suppose that I-'