[54] [Footnote 50: Under the words _Perparus_, _Perpera_, _Hyperperum_, Ducange is short and vague: Monetae genus.

From a corrupt passage of Guntherus, (Hist.

C.P.c.

8, p.

10,) I guess that the Perpera was the nummus aureus, the fourth part of a mark of silver, or about ten shillings sterling in value.