Good Luck by L.T. Meade

Both Alison and Mrs. Reed were quite of the opinion that, somehow or other, the affair of the five-pound note would soon be cleared up. The more the two women talked over the whole occurrence, the more certain they were on that point. When Grannie questioned her carefully, Alison confessed that while she was attending to her two rather troublesome customers, it would have been quite within the region of possibility for someone to approach the till unperceived. Of course Alison had noticed no one; but that would not have prevented the deed being done.

"The more I think of it, the more certain I am it's that Clay girl," said Grannie. "Oh, yes, that Clay girl is at the bottom of it. I'll tell Jim so the next time he calls."