"But Bob—" Mrs. Vernon began.

"Bob knows, and I'll need a partner. If Miss Hyslop didn't leave the settlement on the night express, she'll be hitting the trail through the woods for the United States. You must hustle."

Mrs. Vernon left him, and a few minutes afterwards the fast motor launch swung out from the landing and sped down river with a white wave at her bows. Grace watched the boat vanish behind a wooded point and then went to her tent. She was horribly angry and shocked. Barbara had cheated her and disgraced them all.

[CHAPTER IV]

[THE GIRL ON THE PLATFORM]

The Vancouver express was running in the dark through the woods west of Fort William. After the rain of early summer, wash-outs that undermine the track are numerous and the express had been delayed. Now, however, the road was good and the engineer drove his big locomotive with throttle wide open. Black smoke blew about the rocking cars, cinders rattled on the roofs, and showers of sparks sped past the windows. The wheels roared on shaking trestles and now and then awoke an echoing clang of steel, for the company was doubling the track and replacing the wooden bridges by metal.

This was George Lister's business, and he lounged in a corner of a smoking-compartment, and rather drowsily studied some calculations. He was bound West from Montreal, and in the morning would resume his labors at a construction camp. There was much to be done and the construction bosses who had sent for him were getting impatient.

Lister's thoughts wandered from the figures. He liked his occupation and admitted that he had been lucky, but began to see he had gone as far as he could expect to go. The trouble was, he had not enjoyed the scientific training that distinguished the men who got important posts. His mechanical career began in the engine-room of a wheat-boat on the lakes, and he had entered the railroad company's service when shipping was bad and steamers were laid up. Although he had studied for a term or two at McGill University, he knew his drawbacks. Sometimes promotion was given for merit, but for the most part the men who made progress came from technical colleges and famous engineering works.

An accident in the ranges on the Pacific slope, when a mountain locomotive jumped the track and plunged down a precipitous hillside, gave Lister his first chance. He got the locomotive back to the line, and being rewarded by a better post, stubbornly pushed himself nearer the front. Now, however, it looked as if he must stop. Rules were not often relaxed in favor of men who had no highly-placed friends. Yet Lister wondered.

Not long since, a gentleman whose word carried some weight at the company's office had visited the construction camp with his indulged daughter. The girl was clever, adventurous, and interested by pioneer work, and Lister had helped her to some thrills she obviously enjoyed. She had, with his guidance, driven a locomotive across a shaking, half-braced bridge, fired a heavy blasting shot, and caught big gray trout from his canoe. Although Lister used some reserve, their friendship ripened, and when she left she hinted she had some power she might be willing to use on his behalf.