THIRD WARNING

By
ROY J. SNELL

The Reilly & Lee Co.
Chicago

COPYRIGHT 1938
BY
THE REILLY & LEE CO.
PRINTED IN THE U. S. A.

CONTENTS

CHAPTER PAGE

I Flaming Island 11

II The Battle of Siskowit 29

III Beauty and a Threat 39

IV Plumdum 48

V Night Signals 58

VI Chips 72

VII Rescued 84

VIII Mysterious Youth 98

IX The Defense of Chippewa 106

X Riding the Storm 122

XI Ashes in Their Hair 134

XII The Crimson Spot 141

XIII And May You Come Back 148

XIV A Desperate Venture 154

XV The Dog’s Parachute 160

XVI Who Rides a Moose 168

XVII The Phantom of Superior 177

XVIII Father Superior at His Worst 184

XIX A Flash in the Dark 192

XX A Weird Resting Place 198

XXI Second Warning 206

XXII Strange Comrades in Battle 216

XXIII Don’t Stay Too Long 229

XXIV The Invisible Host 239

XXV Out of the Air 247

THIRD WARNING

CHAPTER I
FLAMING ISLAND

“Look, Dave. See those strange clouds?” Florence Huyler shaded her eyes to look away toward the horizon. Her face wore an expression of bewildered curiosity.

“Yes, I see them. They are queer!” young “Captain Davie,” as everyone called him, replied as he wrinkled his brow. After giving the wheel of his motor-driven craft a turn, he studied those clouds. “Scurrying along the horizon,” he murmured, “they roll quite a bit, don’t they?”

“Yes, and such a peculiar shade of yellow,” Florence added. “Oh well, clouds are different up here on Lake Superior.”

“Nothing to worry about, I guess,” said Dave, as once again he gave his attention to the wheel.

As for Florence, at the moment she had nothing to do but think. And such bitter-sweet thoughts as they were! She was cruising on Lake Superior. That was grand! She had always loved the water. What was still more magnificent, she was landing twice a week on the shores of that place of great enchantment—Isle Royale.

Once, you will recall from reading The Phantom Violin, Florence with two companions had made her summer home on a huge wrecked ship off the rocky shores of this very island. What a summer that had been! Adventure? Plenty of it. The ship had at last been completely destroyed during a storm. They had barely escaped with their lives. The girl shuddered a little even now at the thought of it.

Florence was large, strong, fearless. A marvelous swimmer and a grand athlete, she had little to fear on land or water. And yet, as her eyes swept the deck of the Wanderer, the sixty-foot motor-boat on which she rode, a troubled look came into her fine blue eyes. Nor were those low, circling clouds the cause of her worry. She and her cousin Dave, quite as courageous and venturesome as she, had embarked upon an enterprise that promised to be a failure.

“Grandfather will lose his money. He can’t afford to lose, and it’s not all our fault,” she told herself a little bitterly. But now her thoughts were broken by a short, stout, bronze-faced man, an Indian who appeared at the cabin door.

“Look, John!” she pointed, speaking to the Indian. “Look at those strange clouds!”

“Huh!” he grunted. “Smoke!”

“Sm-smoke!” the girl stared. Then she breathed a sigh of relief. “Oh, from Canada! Forest fires. I’ve heard—”

“No Canada. Come from Isle Royale, that smoke. Island on fire.”

“On—on fire?” It was Dave who spoke.

“Yes.”

“Then that—that’s the end.” His voice was toneless with