This they did. Then they strolled down to the shops, took in the roundhouse, got an early dinner, and went to visit the museum at the Mechanics' Exchange. This was quite an institution of Bridgeport, and generally interested railroad men. Clark was very agreeable to the proposition made by his companion to look over the place. They found a fine library and a variety of drawings and models, all along railroad lines.
"This suits me exactly," declared Clark. "I am not and never will be a practical railroader, but I like its variety just the same. Another thing, a fellow learns something. Say, look there."
The speaker halted his companion by catching his arm abruptly, as they turned into a small reading room after admiring a miniature reproduction in brass of a standard European locomotive.
"Yes, I see," nodded Ralph, with a slight smile on his face, "our friend, Wheels."
Both boys studied the eccentric youth they had seen for the first time a few hours previous. He occupied a seat at a desk in a remote corner of the room. Propped up before him was a big volume full of cuts of machinery, and he was taking notes from it. A dozen or more smaller books were piled up on a chair beside him.
Young as he was, there was a profound solem-
