By telegraph and by messenger, inquiries went forward. Her heart-broken, frantic husband was given leave, and at the risk of his life he scoured that wild country. The secret service did its utmost. Nothing happened. No word ever came back to Peshawar.

“It was like looking for a needle in a haystack, and in time, for most people, the game lost its thrill. The hue and cry died down. All save a few forgot.

“When I retired from the Yard and set out on this trip around the world, India was of course on my itinerary. Though it was far off my track, I resolved to visit Peshawar. I went down to Ripple Court in Devonshire and had a chat with Sir George Mannering, the uncle of Eve Durand. Poor man, he is old before his time. He gave me what information he could - it was pitifully meager. I promised I would try to take up the threads of this old mystery when I reached India.”

“And you did?” Rankin inquired.

“I tried - but, my dear fellow, have you ever seen Peshawar? When I reached there the hopelessness of my quest struck me, as Mr. Chan might say, with an unbearable force. The Paris of the Pathans, they call it, and its filthy alleys teem with every race in the East. It isn’t a city, it’s a caravansary, and its population is constantly shifting. The English garrison is changed frequently, and I could find scarcely any one who was there in the time of Eve Durand.

“As I say, Peshawar appalled me. Anything could happen there. A wicked town - its sins are the sins of opium and hemp and jealousy and intrigue, of battle, murder and sudden death, of gambling and strange intoxications, the lust of revenge. Who can explain the deviltry that gets into men’s blood in certain latitudes? I walked the Street of the Story Tellers and wondered in vain over the story of Eve Durand. What a place to bring a woman like that, delicately reared, young, inexperienced.”

“You learned nothing?” inquired Barry Kirk.

“What could you expect?” Sir Frederic dropped a small lump of sugar into his coffee. “Fifteen years since that little picnic party rode back to Peshawar, back to the compound of the lonely garrison, leading behind them the riderless pony of Eve Durand. And fifteen years, I may tell you, make a very heavy curtain on India’s frontier.”

Again Bill Rankin turned to Charlie Chan. “What do you say, Sergeant?” he asked.

Chan considered. “The town named Peshawar stands with great proximity to the Khyber Pass, leading into wilds of Afghanistan,” he said.

Sir Frederic nodded. “It does. But every foot of the pass is guarded night and day by British troops, and no European is permitted to leave by that route, save under very special conditions. No, Eve Durand could never have left India by way of the Khyber Pass. The thing would have been impossible. Grant the impossible, and she could not have lived a day among the wild hill men over the border.”

Chan gravely regarded the man from Scotland Yard. “It is not to be amazed at,” he said, “that you have felt such deep interest.