"Good luck! Remember that if ever you come this way again--" "Good-by, sir," said Frank.
He held out his disengaged hand.
Then an astonishing thing happened.

The doctor took the hand, then dropped it; threw his arms round the boy's neck, kissed him on both cheeks, and hurried back through the garden gate, slamming it behind him.

And I imagine he ran upstairs at once to see how the mice were.
* * * * * Well, that is the whole of the incident.

The two haven't met since, that I am aware.

And I scarcely know why I have included it in this book.