B. The canon law introduced milder principles. Gregory the Great had already prohibited the holding on to the body of the debtor.(549) On this account, during the latter portion of the middle ages, it was customary to stipulate by contract that the provisions of the ancient law should govern in this matter, to submit to imprisonment etc.(550) The influence of the Roman law made it gradually more usual, in the case of insolvent debtors, to demand no more from them than the assignment of their property for the benefit of their creditors. This, however, led to numerous frauds; and these became more frequent in proportion as the laws governing the property of parties while the marriage relation existed between them, and as executions against landed property etc. were defective. C. Hence, in more highly civilized times, there has been a return to the severity of earlier ages. Persons engaged in commerce, especially those whose capital is so volatile, and to whom time is a thing so precious, can scarcely dispense willingly with personal imprisonment for debt. Hence, legislation on bills of exchange, sanctioned especially by imprisonment of the person, plays a very important part in the commercial cities of the seventeenth century, as it did, naturally, much earlier in Italy and the Netherlands.(551) Modern laws in many cases punish the bankrupt whenever an examination of his books, kept after approved methods, does not demonstrate his innocence.(552) The great facility of fraudulent bankruptcy, where commerce has attained a high degree of development and complication; the absence of honor shown in engaging in speculation for one’s own gain with a stranger’s capital, and without the real owner’s knowledge; the comparatively small number of blameless and irreproachable bankruptcies,(553) certainly justify these provisions.(554)(555) Section XCIII. Means Of Promoting Credit.