"Yes," said the Captain, "I remember them; they came up the river some weeks ago." Then he turned to the children. "Would you know that soldier if you were to see him again?" he asked. "Oh, yes," said the children. "Very well," said the Captain, "the men will go to breakfast soon. You stay with Sam and watch them, and if you see that man go by you step on Sam's foot. No one must see you do it. Be sure you don't make a mistake now," he added, "and if you really do unearth the rascal, it's the best day's work you ever did, for yourselves as well as for France. Sam, you report to me afterwards, and be sure you give no occasion for suspicion to any one." "Yes, sir," said Sam, and saluted. Pierre and Pierrette saluted also. The Captain returned the salute with ceremony. "You are true soldiers of France," he said to the Twins as they left his tent. If their comrades were surprised to see Uncle Sam standing with two children by his side while the others passed into the mess tent with cups and plates in hand, no one said anything. It was a little irregular to be sure--but then--Americans were always unexpected! For a long time the men filed by, and still there was no sign of the face they sought. At last, however, Pierre came down solidly on Uncle Sam's right foot, and at the same time Pierrette touched his left with her wooden shoe. There, right in front of them, carrying his plate and cup, and twirling his mustache, was the man they sought! The Twins stood still, and not by the quiver of an eyelash did they betray any excitement until the man had passed into the tent. Then Uncle Sam said to them, "Now you scoot for home, or your Mother will be worried to death! Tell your Father and Mother all about it, but don't tell another soul at present." The children flew back across the meadow, picked up their basket of cress, and when they reached the Chateau, fed the hungry rabbits. Then they found their Father and Mother and told them their morning's adventures. XIII. CHILDREN OF THE LEGION