“Larry, can you get a launch? You told me the other day you took Colonel Wigmore’s when you needed one.”

“Why, yes, I can get one. What for?”

“Where is it? Let’s walk in that direction.”

At Lucy’s earnestness Larry glanced keenly at her and answered, “All right. Come straight across town to the Embankment. There ought to be a launch along there that I can pick up. Where do we go in it?”

Lucy handed him Elizabeth’s letter saying, “Read that. I found it in the pocket of Herr Johann’s coat yesterday. Bob is tired out and his leg hurts him. I wouldn’t let him know for anything. That’s why I’m begging you to help me. I want to follow Elizabeth and see where she goes. You and I have often gone out on the river for an hour. No one need know the truth. We’ll find out why Elizabeth meets Franz. If she’s all right, I want to know it, and if she isn’t——”

Lucy’s voice shook a little. She was too fond of Elizabeth to face the discovery of her treachery without real sorrow. Even now she could not believe in it, and her thoughts wavered wretchedly between doubt and confidence.

“Larry, I don’t think she would deceive us! I can’t believe it!” she cried, as Larry finished reading Elizabeth’s note and handed it back to her.

“Hum—looks queer,” was his comment. Then, after a moment’s silence, “All right, Lucy, we’ll go. And I’m going to take someone else along. You won’t mind when you see who it is.”

He turned to beckon to a passing soldier as he spoke and Lucy did not hear his last words. They were nearing one of the tree-bordered walks of the Rhine Embankment.

“Look, there’s an airplane,” said Lucy, pointing across the river.