Helen was white under her delicate make-up, but she said perfectly calmly: "I appreciate your position, Superintendent. But you are wrong in assuming that my husband was implicated in the murder. If you have proof that he was not in the flat on the evening of the 17th, no doubt you are right. I know nothing of that. What I do know is that he had no hand in the murder of Ernie Fletcher."
"Yes, Mrs. North? Shall we wait to hear what he himself may have to say about that?"
"It would be useless. As far as I know, he was nowhere near Greystones on the night of the 17th. It is quite possible that he may try to convince you that he was, for - for he is the sort of man, Superintendent, who would protect his wife, no matter how - how bad a wife she had been to him."
Her voice quivered a little, but her face was rigid. Sally caught her breath on a lungful of smoke, and broke into helpless coughing. Hannasyde said quite gently: "Yes, Mrs. North?"
"Yes." Helen's eyes stared into his. "You see, I did it."
Hannasyde said nothing. Glass, who had been watching Helen, said deeply: "It is written, speak ye every man the truth to his neighbour. Surely the net is spread in vain in the sight of any bird!"
"Not this bird!" choked Sally. "Helen, don't be a fool! Don't lose your head!"
A faint smile just curved Helen's lips. She said, still with her gaze fixed on Hannasyde's face: "My evidence was true as far as it went. Ernie Fletcher did show the stranger off the premises, and I did return to the study to search for my IOUs. What was untrue was my story that I got out of the room before he returned to it. I didn't. He found me there. He sat down at his desk. He laughed at me. Taunted me. I saw it was no use trying to plead with him. I - I suppose I must have been mad. I killed him."
Sally, who had by this time recovered from her coughing fit, said witheringly: "With your little hatchet. Don't you realise that this isn't a gun-pulling affair, you cuckoo? Whoever killed Ernie did it by violence. If you'd tried to bat him on the head I don't say you wouldn't have hurt him, but you haven't the necessary strength to smash his skull."
"I caught him unawares. I think I must have stunned him. At that moment, I was so - so angry I wanted to kill him. I hit him again and again…' Her voice failed; a shudder shook her, and she raised her handkerchief to her lips.