If I didn't think I could be of some use to you I should make myself scarce.

What I propose is this, Mrs.Clover.When Polly comes in--never mind how late it is, I'll see you safe 'ome--let her get upstairs just as usual.

Then you go up to her door and you knock and you just say, 'Polly, it's me, and I want a word with you; let me come in, please ?' If she lets you in, all right; have a talk and see what comes of it.

If she won't let you in just come down again and let us know, and then we'll think what's to be done next." This suggestion was approved, and time went on as the three discussed the mystery from every point of view.

At about ten o'clock Mrs.Bubb's ear caught the sound of a latch-key at the front door.