He seemed extraordinarily excited. “Someone fired a shot!”

“Where?” asked Ellery, his eyes on the rove. “Keith?”

“Don’t know where he is. Milly says it might have come from behind the house. I was napping and couldn’t tell. Revolvers! At least he’s come out in the open.”

“Who has?” asked Ellery.

The fat man shrugged. Ellery went through to the kitchen and opened the back door. The snow outside was smooth, untrodden. When he returned to the living-room Alice was adjusting a scarf about her neck with fingers that shook.

“I don’t know how long you people intend to stay in this ghastly place,” she said in a passionate voice. “But I’ve had quite enough, thank you. Mr. Thorne, I insist you take me away at once. At once! I shan’t stay another instant.”

“Now, now, Miss Mayhew,” said Thorne in a distressed way, taking her hands. “I should like nothing better. But can’t you see” Ellery, on his way upstairs three steps at a time, heard no more. He made for Thome’s room and kicked the door open, sniffing. Then, with rather a grim smile, he went to the tumbled bed and pulled the pillow away. A long-barreled, old-fashioned revolver lay there. He examined the cylinder; it was empty. Then he put the muzzle to his nose.

“Well?” said Thorne from the doorway. The English girl was clinging to him.

“Well,” said Ellery, tossing the gun aside, “we’re facing fact now, not fancy. It’s war, Thorne, as you said. The shot was fired from your revolver. Barrel’s still warm, muzzle still reeks, and you can smell the burnt gunpowder if you sniff this cold air hard enough. And the bullets are gone.”

“But what does it mean?” moaned Alice.