Gerald coughed. "Mine," he said, "isn't exactly a—fish, because it——"

"Emu," said everybody.

"That was subtler," said Dennis, "but it didn't deceive us."

"Your turn," said Norah to me. And they all leant forward ready to say "Emu."

"Mine," I said, "is—all right, Dennis, you needn't look so excited—is a word I once heard a man say at the Zoo."

There was a shriek of "Emu!"

"Wrong," I said.

Everybody was silent.

"Where did he say it?" asked Norah at last. "What was he doing?"

"He was standing outside the Emu's cage."