On Thursday morning, however, Pennold betook himself leisurely to the nearest subway station, and there the real trial of strength between him and his unseen antagonist began. From the Brooklyn Bridge station he rode to the Grand Central; then with a speed which belied his physical appearance, he raced across the bridge to the downtown platform, and caught a train for Fourteenth Street. There he swiftly turned north to Seventy-second Street--then to the Grand Central, again to Ninety-sixth, and so on, doubling from station to station until finally he felt that he must be entirely secure from pursuit. He alighted at length at a station far up in the Bronx, and after looking carefully about he started off toward the west, where the mushroom growth of the new city sprang up in rows of rococo brick and stone houses with oases of green fields and open lots between. He turned up a little lane of tiny frame houses, each set in its trim garden, and stopped at the fourth cottage. With a last furtive backward glance, Pennold mounted the steps and rang the bell nervously. The door was opened from within so suddenly that it seemed as if the man who faced his visitor on the threshold must have been awaiting the summons. He stepped quickly out, shutting the door behind him, and for a short space the two stood talking in low tones--Pennold eagerly, insistently, the other man evasively, slowly, as if choosing his words with care. He was as erect as Pennold was shambling and stoop-shouldered, and although gray and lined of features, his eyes were clear and more steady, his chin more firm, his whole bearing more elastic and forceful. He did not invite his visitor to enter, and the colloquy between them was brief. It was significant that they did not shake hands, but parted with a brief though not unfriendly nod. The tall man turned and re-entered his house, closing the door again behind him, while Pennold scuttled away, without a farewell glance. It might have been well had he looked once more over his shoulder, for there, crouching against the veranda rail where he had managed to overhear the last of the conversation, was that short, swarthy figure which had followed so indefatigably on his trail for three days--which had clung to him, closely but unseen, through all his devious journey of that morning. Suraci had not failed. He tailed Pennold to his home, then went in person with his report to the great Blaine himself, who heard him through in silence, and then brought his mighty fist down upon his desk with a blow which made the massive bronze ink-well quiver. "That's our man! You've got him, Suraci. Good work! Now wait a little; I want you to take some instructions yourself over to Morrow."