The more he thought of it the more he was convinced that this was to be a singular and difficult case. Properly worked up it would reflect much credit on the officer who should finally bring it to a successful issue. Once in the course of his varied speculations on the subject he came very close indeed to the truth; he canvassed the possibility that the theatre was burned from motives of malice or revenge, for Gorham was a man who made and kept bitter enemies. But the fact that any fool must know that so large and valuable a property was always amply insured would, he thought, prevent antagonism or reprisal from taking that form, since the loss would fall most heavily upon the various companies who had assumed the risk,--vague, unimagined corporations, beyond the scope of malice or antagonism, foreign to the thought of an incendiary. Still meditating aimlessly about the question of insurance, he began to wonder if Gorham were not actually a gainer rather than a loser by the fire. The theatre's furnishings were getting shabby and out of style; much of the scenery was old; the site had become, by reason of one of those swift expansions of the commercial section of the town, so common in our growing southwestern cities, more valuable by far than the building itself; the season had not been very prosperous,--too much legitimate drama to cope successfully with spectacular opposition. The smaller theatres drew the crowds, and light opera was the vogue. More than all, there was of record a rather heavy mortgage on the structure itself, which showed that the owner had needed money in considerable emergencies. Taken all in all, Gorham was doubtless in better financial case now, a richer man to-day than yesterday. All at once the detective began to put two and two methodically together. Gorham, by reason of the heavy insurance, had profited by the burning of the theatre. The boy, who was known to have secretly entered the house, presumably for the purpose of theft, had unwittingly manifested a tumult of excited interest upon the sheer mention of the insurance of the building,--a matter usually absolutely alien to one of his age, his class, and his ignorance; when in a state of obviously alert suspicion he became aware that this incongruity had been observed, he grew so restive under surveillance, evidently recognizing its menace, that the officer, not wishing to make an arrest prematurely, was obliged to withdraw, and only shadow him from afar. _Insurance!_ Had the boy indeed done nothing to indicate the perpetrator of the crime!