Free Third Girl by Agatha Christie

Should she go down to Long Basing? But Poirot had already been there-and found out presumably what there was to be found out. What excuse could she offer for barging into Sir Roderick Horsefield's house?
    She considered another visit to Borodene Mansions. Something still to be found out there, perhaps? She would have to think of another excuse for going there. She wasn't quite sure what excuse she would use but anyway, that seemed the only possible place where more information could be obtained. What was the time?
    Ten a.m. There were certain possibilities...
    On the way there she concocted an excuse. Not a very original excuse. In fact, Mrs Oliver would have liked to have found something more intriguing, but perhaps, she reflected prudently, it was just as well to keep to something completely everyday and plausible. She arrived at the stately if grim elevation of Borodene Mansions and walked slowly round the courtyard considering it.
    A porter was conversing with a furniture van - A milkman, pushing his milk-float, joined Mrs Oliver near the service lift.
    He rattled bottles, cheerfully whistling, whilst Mrs Oliver continued to stare abstractedly at the furniture van.
    “Number 76 moving out,” explained the milkman to Mrs Oliver, mistaking her interest. He transferred a clutch of bottles from his float to the lift.
    “Not that she hasn't moved already in a manner of speaking,” he added, emerging again. He seemed a cheery kind of milkman.
    He pointed a thumb upwards.
    “Pitched herself out of a window - seventh floor - only a week ago, it was. Five o'clock in the morning. Funny time to choose.”
    Mrs Oliver didn't think it so funny. “Why?”
    “Why did she do it? Nobody knows. Balance of mind disturbed, they said.”
    “Was she - young?”
    “Nah! Just an old trout. Fifty if she was a day.”
    Two men struggled in the van with a chest of drawers. It resisted them and two mahogany drawers crashed to the ground - a loose piece of paper floated toward Mrs Oliver who caught it.
    “Don't smash everything, Charlie,” said the cheerful milkman reprovingly, and went up in the lift with his cargo of bottles.
    An altercation broke out between the furniture movers. Mrs Oliver offered them the piece of paper, but they waved it away.
    Making up her mind, Mrs Oliver entered the building and went up to No. 67. A clank came from inside and presently the door was opened by a middle-aged woman with a mop who was clearly engaged in household labours.
    “Oh,” said Mrs Oliver, using her favourite monosyllable. “Good-morning. Is - I wonder - is anyone in?”
    “No, I'm afraid not. Madam. They're all out. They've gone to work.”
    “Yes, of course... As a matter of fact when I was here last I left a little diary behind. So annoying. It must be in the sitting-room somewhere.”
    “Well, I haven't picked up anything of the kind. Madam, as far as I know. Of course I mightn't have known it was yours. Would you like to come in?” She opened the door hospitably, set aside the mop with which she had been treating the kitchen floor, and accompanied Mrs Oliver into the sitting-room.
    “Yes,” said Mrs Oliver, determined to establish friendly relations, “yes, I see here - that's the book I left for Miss Restarick, Miss Norma. Is she back from the country yet?”
    “I don't think she's living here at the moment. Her bed wasn't slept in. Perhaps she's still down with her people in the country. I know she was going there last weekend.”
    “Yes, I expect that's it,” said Mrs Oliver. “This was a book I brought her. One of my books.”
    One of Mrs Oliver's books did not seem to strike any chord of interest in the cleaning woman.
    “I was sitting here,” went on Mrs Oliver, patting an armchair, “at least I think so. And then I moved to the window and perhaps to the sofa.”
    She dug down vehemently behind the cushions of the chair. The cleaning woman obliged by doing the same thing to the sofa cushions.
    “You've no idea how