“You see him, Mahomet,” said Cecil. “Make no mistake. Find out what tribe he belongs to, where he comes from, and where he sleeps in Biskra, and I will give you a sovereign. Meet me at the Casino to-night at ten.”

Mahomet grinned an honest grin and promised to earn the sovereign.

Cecil stopped an empty landau and drove hurriedly to the station to meet the afternoon train from civilisation. He had arrived in Biskra that morning by road from El Kantara, and Lecky was coming by the afternoon train with the luggage. On seeing him, he gave that invaluable factotum some surprising orders.

In addition to Lecky, the millionaire observed among the passengers descending from the train two other people who were known to him; but he carefully hid himself from these ladies. In three minutes he had disappeared into the nocturnal whirl and uproar of Biskra, solely bent on proving or disproving the truth of a brand-new theory concerning the historic sack of the Hôtel St. James.

But that night he waited in vain for Mahomet at the packed Casino, where the Arab chieftains and the English gentlemen, alike in their tremendous calm, were losing money at petits chevaux with all the imperturbability of stone statues.

II.

Nor did Cecil see anything of Mahomet during the next day, and he had reasons for not making inquiries about him at the Royal Hotel. But at night, as he was crossing the deserted market, Mahomet came up to him suddenly out of nowhere, and, grinning the eternal, honest, foolish grin, said in his odd English—

“I have found—him.”

“Where?”

“Come,” said Mahomet, mysteriously. The Eastern guide loves to be mysterious.