The car rolled up to the bridge and passed over the dark waters where tugs were shunting car-floats into their docks and churning up white foam with their propellers. Thousands of lights were reflected in the black depths. In a moment the Harlem was behind them, and they were in the borough of the Bronx. On they sped up Third Avenue.

The two boys were distracted. They wanted to see the sights, utterly new to them, and they wanted to hear the discussion of their elders. Willie, with that strange faculty of his for noting places and locations, kept watching the street signs and trying to remember where Third Avenue led to on the map.

"There are three places on Echo Bay where a motor-boat and a motor-car can easily meet," said one of the secret service men. "At the north side of the harbor entrance is a finger of land called Premium Point. On the other shore is Huguenot Park. And an arm of the bay runs inland all the way to the main street passing north through the town."

"Which place would they be most likely to select?" asked Captain Hardy.

"Well, they'd hardly try Premium Point because that is a private estate, and they would have difficulty in getting to the water-front."

"Then that limits them to the two others."

"Exactly. And one is as easy to get to as the other."

Captain Hardy frowned. "What are we going to do?" he asked. "We might pick the wrong place and miss them. And since there are several of these spies in the boat, and they are desperate fellows, we'd never dare divide our forces. What are we going to do?"

"Gee!" said Willie. "We just passed Two Hundredth Street. Some town, eh, with two hundred numbered streets?"

The car rushed on. In silence the three men were considering how they should meet the situation before them.