"It won't be your last chance, I'm sure," said Patsy. "Will that dreadful Colonel Grau go, too?"
"No; he is to remain. But all regiments quartered here are now marching out and to-morrow a fresh brigade will enter Ostend."
They were silent a time, until someone rapped upon the door. Von Holtz admitted a slim, good-looking young Belgian who grasped his hand and said eagerly in French:
"You sent for me?"
"Yes. You may speak English here, Monsieur Rondel." Then he presented his friend to the Americans, who approved him on sight.
Henderson came a few minutes later and listened respectfully to the plan Miss Doyle unfolded. He was to go with Monsieur Rondel to Charleroi, find Mrs. Denton, explain that her husband was very ill, and bring her back with him to Ostend. He would report promptly on his return and they would tell him what to do next.
The man accepted the mission without a word of protest. Charleroi was in central Belgium, but that did not mean many miles away and Rondel assured him they would meet with no difficulties. The trains were reserved for soldiers, but the Belgian had an automobile and a German permit to drive it. The roads were excellent.
"Now, remember," said Patsy, "the lady you are going for is Mrs. Albert Denton. She lives with her mother, or did, the last we heard of her."
"And her mother's name and address?" inquired Henderson.