The key of worldly wealth. Or, a new vvay, for improving of trade : shewing how a few tradesmen agreeing together, may both double their stocks, and the increase of their stocks, without 1. Paying any interest, 2. Great difficulty or hazard, 3. Advance of money, 4. Staying for materialls, 5. Prejudice to any trade, or person, 6. Incurring any other inconvenience. In such sort, as both they and all others (though never so poore) who are in a way of trading, may 1. multiply their returnes, 2. Deale onely for ready pay, 3. Much under-sell others, 4. Put the whole nation upon this practice, 5. Gain notwithstanding more then ordinary, 6. Desist when they please without damage: And by this meanes this distressed commonwealth shall be exceedingly advantaged, chiefly in all those particulars expressed in the next page. All which in this treatise in conceived by judicious men to be fully proved, doubts resolved, and objections either answered or prevented. - Potter, William. (Printed by R.A. and are to be sold by Giles Calvert at the black spread Eagle neer the west end of Pauls, 1650)