"I feel like a scoundrel of the worst sort, but it can't be helped," he muttered.
The car was soon at hand.

Tom and Harry were dressed and ready.
Though their clothing suggested the field engineer, they were none the less dressed with a good deal of care.

They entered the tonneau of the automobile and started on their way to help put the mine swindle through.
"Here are my engineers, gentlemen," smiled Don Luis, "and at least three of your number, I believe, are well acquainted with Messrs.
Reade and Hazelton." Tom ascended the steps, feeling rather weak in the knees.

Then the young engineers received one of the severest jolts of their lives.
Three of the gentlemen in that group, both young men knew well.
They were President Haynes, General Manager Ellsworth and Director Hippen of the A.G.& N.M.Railroad.

These gentlemen Tom and Harry had served in railroad work in Arizona, as told in "_The Young Engineers in Arizona_." Now, in a flash, it was plain to both young Americans why Don Luis had wanted them, especially, to report favorably concerning _El Sombrero_ Mine.