Passing a favorite restaurant, where officers and ladies were wont to rendezvous when in town, they caught sight of the missing ambulance. "Weren't you ordered to be at headquarters for Lieutenant Riggs at three o'clock?" demanded the judge-advocate of the driver. "Yes, sir," replied that party, glancing in nervous embarrassment over his shoulder at somebody in the depths of the vehicle, "but--" A forage-capped head appeared from behind the curtain; the benign features of Captain Breen slowly hove in sight, and a smile of greeting spread thereover as his eyes met those of the staff-officers. "Oh, ah! Good-afternoon, colonel. How de do, Captain Park. Why--yes, there was something said about going for Riggs when we got through--when the ladies finished shopping, you know. I was just reading the evening paper. If you are ready, Riggs, I--I'll hurry them out now," said the captain, startled into civility to the subaltern on seeing the distinguished company in which he drove. "Thanks; we won't trouble you. Hup there!" said Captain Park, dryly and energetically, as once more the grays dashed off at rapid trot, and in half an hour Mr. Riggs was landed in front of his quarters in the garrison. He said very little as he stepped from the light road-wagon, but he grasped the extended hands of the two officers, and looked up in their faces with mute eloquence. The post surgeon happened along at the moment, and Riggs turned eagerly towards him. "A little easier, if anything," said the doctor, in answer to the look of anxious inquiry. "Better, I think, than she has been for the last two days. Your telegram cheered her a good deal." "Excuse me now, will you, gentlemen?" said the lieutenant to his late conductors. "You understand my haste, and will forgive my inhospitality in not asking you in. You--you don't know how I thank you." And with that he was gone. "Doctor, what seems the matter with Mrs. Riggs?" asked the judge-advocate, impetuously. "Heart-trouble mainly. Any great anxiety tells right there. She was a very sick woman yesterday. Won't you stop at my quarters?" "Thanks, no. We were just out for a drive, and must get back."