So they had a guinea which they said was twenty shillings and then there were two coins either shillings or guineas that was the money at the time.

于是，他们就生产出了,一个等同于二十先令的几尼,所以出现了两种硬币,先令或是几尼,这是当时流行的货币。

耶鲁公开课 - 金融市场课程节选

So it started to drift and people started to think I think a guinea is worth more than twenty shillings and the market price drifted up to twenty-one shillings.

所以，它的价值开始波动，人们开始考虑,我认为一个几尼的价值多于二十个先令的价格,于是市场价格就上升到二十一先令的价值上去了。

耶鲁公开课 - 金融市场课程节选

Then they implemented a rule that the guinea is worth twenty-one shillings.

于是政府就执行了一个新令,规定一个几尼值二十一个先令的价值。

耶鲁公开课 - 金融市场课程节选