Because the Bank of England could then demand all the it could start accumulating notes from some issuing bank and then demand payment in gold.

因为英格兰银行那时可以,要求所有的，它可以开始从一些纸币发行银行,收集些发行的纸币之后再要求以金子的形式偿还。

耶鲁公开课 - 金融市场课程节选

They also had--they were--back then, in the 1920s, they were called balloon payment.

上世纪20年代有一种,称为期末大额偿还的贷款方式

耶鲁公开课 - 金融市场课程节选