Again he compelled himself to gaze at her, and subconsciously took note of her poor and patched attire. The incongruity of her string of pearls and the diamond rings upon her fingers impressed him even in the presence of death. Step by step he retreated backward across the room, his glance roaming upward toward the gallery which circled the library and the short staircase leading to it, but always his eyes returned to that still and lonely figure by the tea table. A few minutes later the faint sound of the front door being closed disturbed a large ball of fur. A gray Angora cat jumped from its hiding place and, with its back arched in fright, scampered through the porti�res, and fled along the hall and up the staircase to the attic. CHAPTER II THE SUMMONS The broad streets of Washington City presented a lively scene as Dr. Leonard McLean drove his car with increasing slowness down Connecticut Avenue, crowded with government employees hastening to their offices. The congestion was even greater than usual owing to the downpour of rain as the drenched pedestrians swarmed around the street car stops in their endeavor to board cars, already packed to their limit, and arrive promptly at nine o'clock at their various destinations. McLean slowed down to a stop within the fifteen feet limit prescribed by law, as the street car ahead of him halted to take on passengers, and watched with interest the futile efforts of the conductor to prevent the desperate rush made by both men and women to get through the car door at the same time. Suddenly, McLean discerned a familiar face in the crowd before him and sounded his horn. The unexpected "honk" created confusion among those unable to find even clinging room, and the conductor, taking advantage of the diversion, signaled to the motorman and the car sped onward. "Hey, Leigh!" hailed McLean. "Leigh Wallace!" Major Wallace glanced around and with a wave of his hand McLean indicated the vacant seat in his roadster. "Hop in!" he exclaimed, as Wallace hurried across the intervening space between the car and the curbstone. "I'll give you a lift downtown," and, hardly waiting for Wallace to seat himself and close the door, the busy surgeon released the clutch and the roadster sped down Connecticut Avenue. It was not until they were clear of traffic and were approaching the intersection of Twenty-first Street and Massachusetts Avenue that McLean realized his companion had not returned his greeting or addressed a word to him since entering the car. Turning his head, he eyed him unobtrusively. Wallace sat moodily staring ahead; his big frame, slumped in the easiest posture, seemed to fill the broad seat of the Packard. McLean took silent note of Wallace's expression and the unhealthy pallor of his skin. "Get any sleep last night?" he asked.