We feel sure that they knew our signals, but we believe they accidentally hit upon the knowledge.

There is no use in crying over spilt milk.

We shall have to change all our signals and take care that it doesn't happen again.

And now let's talk of something more agreeable, for basketball is a sore subject with me in more than one sense." The talk drifted into other channels much to Anne's relief.
"I have an idea!" exclaimed Hippy.
"Impossible," said Reddy.

"No one would ever accuse you of such a thing." "Be silent, fellow," commanded Hippy.