"Is it really you?" asked Holmes at last, "or is it some new trick of this confounded desert?" He rubbed his eyes. "I never saw a mirage like this before and I don't think the heat has affected my brain." He moved his horse closer. "Could you shake hands?"

Barbara held out her hand. "I assure you that I am very substantial," she laughed, "and I am here to stay, too."

"That's great! By George! it's good to see you," cried Holmes so heartily that the girl turned away her face and caused her horse to move ahead.

The engineer's horse, with a word from his rider, kept his place by El
Capitan's side.

"It's very nice of you to say that but I didn't see you anywhere around last night when the stage arrived. Abe and Pat and Texas were there and this morning even Pablo came the first thing after breakfast."

Willard Holmes could not altogether hide his pleasure at her hinted rebuke. So she had thought of him—had looked for him—had missed him. "Indeed, you must forgive me. I did not know you were coming," he said and explained how his work took him away from Kingston much of the time.

"Of course, under those circumstances, I must forgive you," agreed Barbara, then added seriously: "I think I could forgive anyone who belonged to this desert work, anything, except one."

"And that?" He was watching her face. "What is it that you could not forgive?"

She returned his look steadily. "Don't you know?"

He drew a little back and she wondered at something in his voice and manner as he answered: "Yes, I know. You could never forgive one for being untrue to his work—for putting anything before the work itself."