After the flesh has been carefully examined throughout, it is discarded, as it is not considered suitable for food, and the shell is dried for half a day or so to make the hinge brittle in order that it may be broken without injury to the mother-of-pearl. After the shell has been roughly cleaned, it is placed in the hold, if the vessel is operating from a shore station, as is commonly the case in Torres Straits. Since long exposure to the sun affects the quality of the mother-of-pearl, it is important that it be kept under cover. On returning to the station, it is thoroughly cleaned, assorted, dried, the dark edges clipped off, and the cleaned shell is packed in shipping cases, each containing from 250 to 325 pounds. On the west coast, where the vessels at times operate 200 or 300 miles from port, the shell is cleaned, assorted and crated on the vessels; whence it may be delivered direct to the steamers. The Northwest shell is somewhat smaller than the mature shell of Torres Straits, averaging about 1100 to the ton, whereas that of Thursday Island runs about 725 to the ton. It is very difficult to prevent the theft of pearls by the fishermen as they are liable to treat them as perquisites if not carefully watched. Indeed, on the Torres Straits vessels it has come about that pearls do not constitute a recognized source of income to the proprietors. There the fishery is now conducted almost exclusively for the shells, as the wage-earners secrete probably as many valuable pearls as they turn over to the rightful owners. The hot sun causes many of the oysters to open, and deft fingers quickly pick out such pearls as may be visible. An oyster may be induced to open its shell by being held near the galley fire on the lugger, and the insertion of a piece of cork holds it open while a pearl is shaken out or hooked out by means of a piece of wire. Then the cork is removed and the oyster closes again with no evidence of robbery. The proprietors of boats who themselves open the oysters almost invariably secure larger yields of fine pearls than those who depend on paid employees, who rarely have the luck to find choice pearls, judging from what they turn in. The government of Queensland has endeavored to put a stop to pearl stealing, and by enactment[261] of 1891, it restricted all selling or buying of pearls within the fishing region except through regularly licensed dealers, whose transactions are open to examination. But the fishermen seem to have little difficulty in evading the laws, and throughout the fleet the men have become so adept that they regard the pearls as their contraband perquisites. And the ease with which these may be secreted is surpassed only by the facility with which they may be sold, notwithstanding legislation to the contrary. Indeed, some employers make no claim to the pearls found, thus enabling them to secure fishermen at lower rates of wages.