This man Mason was nearly fifty years old. His close-cropped hair and his close-shaven beard gave his head and cheeks and lips a uniform color of dark blue; his lips were thin and compressed from a habit of taciturnity, his eyes were small, bright and alert; at any sound he would turn quickly and glance behind him. He had spent twenty years in prison--ten years in Dannemora, five in Columbus, three in Allegheny and two in Joliet. This, however, did not include the time he had been shut up in police stations, calabooses, county jails and workhouses. In the present instance he had been arrested for pocket-picking, and had agreed to plead guilty if the offense were reduced to petit larceny; the authorities had accepted his proposal, and he had been sentenced to six months in the workhouse. He had served four and a half months of his sentence when Archie went into the workhouse. The only time when Mason showed any marked sense of humor was when he told Archie of his having confessed to pocket-picking. The truth was that he was totally innocent of this crime, and if the police had been wise they would have known this. Mason was a Johnny Yegg, that is, an itinerant safe-blower. As a yegg man, of course, he never had picked a pocket, and could not have done so had he wished, for he did not know how; and if he had known how, still he would not have done so, for the yeggs held such crimes as picking pockets in contempt. All of the terms he had served in states’ prisons had been for blowing safes, and all of the safes had been in rural post-offices. The technical charge was burglary, though he was not a burglar, either, in the sense of entering dwellings by night; this was a class of thieving left to prowlers. The preceding fall, however, a safe had been blown in a country post-office near the city, and Mason knew that the United States inspectors would suspect him if they found him, and while he had been innocent of that particular crime, he knew that this would make no difference to the inspectors; they would willingly "job" him, as he expressed it, justifying the act to any one who might question it--they would not need to justify it to themselves--by arguing that if he had not blown that particular safe he had blown others, so that the balance would be dressed in the end. Consequently, when the police arrested him for pocket-picking, he hailed it as a stroke of good fortune and looked on the workhouse as an asylum. He had been a model prisoner, and had given the authorities no trouble. He did this partly because he was a philosophical fellow, patient and uncomplaining, partly because he did not wish to attract attention to himself. His picture and his measurements, taken according to the Bertillon system, were in every police station in the land.