Ezra was patiently waiting for one of three boats. Which one, he didn't know--but by the process of elimination he had figured to a mathematical certainty that one of them ought to carry two uncut diamonds which were destined never to visit the customs office. Little by little, through the months that had passed, he had weeded out the ships which failed to make port at the time the diamonds arrived--calculating the time by the dates on which the stones appeared elsewhere--and there were only three ships left. One of them was a North German Lloyder, the second belonged to the Hamburg-American fleet, and the third possessed an unpronounceable Welsh name and flew the pennant of the Llanarch line. As it happened, the two German ships ran into the teeth of the gale and were delayed three days in their trip, while the Welsh boat missed the storm entirely and docked on time. Two days later came a message from Washington to the effect that two diamonds, uncut, had been offered for sale in Philadelphia. "Have to have one more month," replied Marks. "Imperative! Can practically guarantee success by fifteenth of January"--for that was the date on which the Welsh ship was due to return. "Extension granted," came the word from Washington. "Rely on you to make good. Can't follow case any longer than a month under any circumstances." Marks grinned when he got that message. The trap was set, and, unless something unforeseen occurred, "E. Z." felt that the man and the method would both be in the open before long. When the Welsh ship was reported off quarantine in January, Marks bundled himself into a big fur coat and went down the bay in one of the government boats, leaving instructions that, the moment the ship docked, she was to be searched from stem to stern. "Don't overlook as much as a pill box or a rat hole," he warned his assistants, and more than a score of men saw to it that his instructions were carried out to the letter. Beyond exhibiting his credentials, Marks made no effort to explain why the ship was under suspicion. He watched the deck closely to prevent the crew from throwing packages overboard, and as soon as they reached dock he requested all officers to join him in one of the big rooms belonging to the Customs Service. There he explained his reasons for believing that some one on board was guilty of defrauding the government out of duty on a number of uncut diamonds. "What's more," he concluded, at the end of an address which was purposely lengthy in order to give his men time to search the ship, "I am willing to stake my position against the fact that two more diamonds are on board the ship at this moment!" Luckily, no one took him up--for he was wrong. The captain, pompous and self-assertive, preferred to rise and rant against the "infernal injustice of this high-handed method."