There was an exclamation, some words of apology, and involuntarily Masterson stepped backward into the stream of light from the open window, and Monroe, looking around, read the whole situation at a glance. Masterson still suspected him, and was listening! Monroe frankly laughed and made a little sound, the mere whisper of a whistle, as he met Masterson's baffled look with one of cool mockery; it was nonchalant to the verge of insolence, and enraged the Southerner, strong in his convictions of right, as a blow could not have done. For a blow a man could strike back, but this mockery! Delaven walked on, unconscious of the suppressed feeling between the two. Masterson was handicapped by the fact that he dared not again mention his suspicions to the McVeigh family, and he strode down the steps to the lawn, furious at the restraint put upon him, and conscious, now, that surveillance was useless, since the Northerner had been put upon his guard. His impatience filled him with rage. He was honest, and he was a fighter, but of what use was that since he had blundered? He had dealt clumsy strokes with both hands, but the other had parried each thrust with a foil. He was worsted--the game was up, but he at least meant to let the interloper know that however clever he might be, there were some people, at least, whom he could not deceive. That was the humor he was in when he saw Monroe excuse himself to Loring, step through the window, and light a cigar, preparatory to a stroll towards the tryst with Pluto. Masterson watched him sauntering carelessly down the steps. He had removed the cigar and was whistling very softly, unconsciously, as one who is deep in some quandary, but to Masterson it seemed the acme of studious carelessness to ignore his own presence; it seemed insolent as the mocking glance through the window, and it decided him. His shoulders unconsciously squared as he stepped forward. "Captain Monroe, I want a word with you," and his tone was a challenge in itself. Monroe turned his head, slowly, finished the bar he was whistling in a slightly louder tone--loud enough to distinguish that it was "Rally 'Round the Flag," whistled very badly. Monroe had evidently little music in his soul, however much patriotism he had in his heart. "Only one, I hope," he said, carelessly, with an irritating smile. "You may have to listen to several before you get away from here!" "From--you?" and there was perceptible doubt in the tone; it added to Masterson's conviction of his own impotence. He dared not fight the man unless Monroe gave the challenge, though it was the one thing he wanted to do with all his heart. "From those in authority over this section," he said, sternly. "Ah!--that is a different matter." "You may find it a very serious matter, Captain Monroe." "Oh, no; I shan't find it, I'm not looking for it," and Monroe softly resumed, _"The Union Forever."_