When they sent Jack down to Mexico they didn't have the slightest idea he'd uncover anything as big as he did. The country south of the Rio Grande, if you recall, had been none too quiet for some time prior to 1914. Taft had had his troubles with it ever since the end of the Diaz regime, and when Wilson came in the "Mexican question" was a legacy that caused the men in the State Department to spend a good many sleepless nights.

All sorts of rumors, most of them wild and bloody, floated up through official and unofficial channels. The one fact that seemed to be certain was that Mexico was none too friendly to the United States, and that some other nation was behind this feeling, keeping it constantly stirred up and overlooking no opportunity to add fuel to the flame. Three or four other members of the State Department's secret organization had been wandering around picking up leads for some months past and, upon the return of one of these to Washington, Stewart was sent to replace him.

His instructions were simple and delightfully indefinite. He was to proceed to Mexico City, posing as the investigator for a financial house in New York which was on the lookout for a soft concession from the Mexican government. This would give him an opportunity to seek the acquaintance of Mexican officials and lend an air of plausibility to practically any line that he found it necessary to follow. But, once at the capital with his alibis well established, he was to overlook nothing which might throw light upon the question that had been bothering Washington for some time past—just which one of the foreign powers was fanning the Mexican unrest and to what lengths it was prepared to go?

Of course, the State Department suspected—just as we now know—that Berlin was behind the movement, but at that time there was no indication of the reason. In the light of later events, however, the plan is plain. Germany, feeling certain that the greatest war Europe had ever known was a matter of the immediate future, was laying her plans to keep other nations out of the conflict. She figured that Mexico was the best foil for the United States and that our pitifully small army would have its hands full with troubles at home. If not, she intended to let Japan enter into the equation—as shown by the Zimmerman note some two years later.

When Stewart got to Mexico City, it did not take him long to discover that there was an undercurrent of animosity to the United States which made itself felt in numberless ways. Some of the Mexican papers, apparently on a stronger financial basis than ever before, were outspoken in their criticism of American dollars and American dealings. The people as a whole, long dominated by Diaz, were being stirred to resentment of the "Gringoes," who "sought to purchase the soul of a nation as well as its mineral wealth." The improvements which American capital had made were entirely overlooked, and the spotlight of subsidized publicity was thrown upon the encroachments of the hated Yankees.

All this Stewart reported to Washington, and in reply was politely informed that, while interesting, it was hardly news. The State Department had known all this for months. The question was: Where was the money coming from and what was the immediate object of the game?

"Take your time and don't bother us unless you find something definite to report," was the substance of the instructions cabled to Stewart.

The secret agent, therefore, contented himself with lounging around the very inviting cafés of the Mexican capital and making friends with such officials as might be able to drop scraps of information.

It was November when he first hit Mexico City. It was nearly the middle of April before he picked up anything at all worth while. Of course, in the meantime he had uncovered a number of leads—but every one of them was blind. For a day or two, or a week at most, they would hold out glowing promise of something big just around the corner. Then, when he got to the end of the rainbow, he would find an empty pail in place of the pot of gold he had hoped for.

It wasn't surprising, therefore, that Stewart was growing tired of the life of continual mystery, of developments that never developed, of secrets that were empty and surprises that faded away into nothing.