A small quantity only could be sold; and the coal masters and the coal proprietors find it more for their interest to sell a great quantity at a price somewhat above the lowest, than a small quantity at the highest.

只能少量销售；煤炭老板和煤炭所有者发现，以略高于最低价的价格大量出售比以最高价出售少量更符合他们的利益。