That secret about Katy, and what she did, was not the only one that Kiddie hid from the field people. He had another—something about himself—that nobody ever suspected, until Freddie Firefly stumbled upon it one night.  
Probably Freddie would never have learned this second secret had he not been trying to find out about the first one. Over in the meadow he had heard Kiddie Katydid his well-worn ditty, Katy did; she did, she did! And he had danced his way into Farmer Green's dooryard because he wanted to have a talk with Kiddie and ask him some questions about that unknown lady.
 
Like all others who tried to into the mystery, Freddie Firefly had no luck at all. For Kiddie Katydid made no reply to his . Kiddie merely smiled in a most annoying fashion and kept on repeating the refrain.
 
"Doesn't your voice ever get tired, singing those silly words over and over again all night long?" Freddie Firefly finally asked.
 
"Oh! no, indeed!" said Kiddie Katydid. "On the contrary it rests my voice to do this." And he solemnly the chorus more rapidly than ever.
 
"There's something queer about that cry of yours!" Freddie Firefly suddenly exclaimed. "I'm watching you closely; but I can't see that your mouth moves the least bit."
 
Again Kiddie Katydid smiled. He saw that Freddie Firefly was puzzled.
 
"Why do you keep moving your wings when you say Katy did?" Freddie Firefly asked him at last.
 
But Kiddie refused to answer that question—a fact which at once made Freddie suspicious. He moved nearer Kiddie Katydid and flashed his light upon him every time Kiddie repeated his odd statement about Katy. And soon Freddie Firefly grew much excited. He actually danced up and down, he was so astonished.
 
"I've found you out!" he cried in a loud voice. "It's no wonder your voice doesn't get tired from that song! For you don't really sing it at all! You make that queer sound by rubbing your wing covers together!"
 
Kiddie Katydid ceased his shrilling. He looked most uncomfortable. And it was not surprising. He had not supposed that Freddie Firefly—or anybody else—would be shrewd enough to discover that secret. It was a family secret—one that had been closely guarded by the Katydids since the beginning of time, almost. And here he had gone and let Freddie Firefly find it out!
 
"I'm right about that and you can't deny it!" cried Freddie Firefly boldly. "You may as well admit that what I say is true," he added.
 
"I certainly won't dispute you," Kiddie Katydid replied. "I have too good manners to do anything so rude as that."
 
"I don't care about your manners," Freddie answered. "I dare say they're good enough, although some people think it's rather rude of you to make so much noise when a good many others are trying to sleep."
 
"I should like to know who objects to my music?" Kiddie Katydid exclaimed hotly. "If Farmer Green has been talking to you, I should like to state that he had better be careful. Anyone who drives a mowing-machine around, when a lot of us are trying to get our rest in the daytime, ought not to complain about a little music on a pleasant night like this."