Which preposition to use with deniers

in Occurrences 4%

After this memorable occasion an edict was issued ordering a levy of six deniers in the pound on every sort of merchandise sold in the kingdom.

of Occurrences 3%

The King promised as long as this assistance lasted to levy no other subsidy and to coin good and sterling moneyi.e., deniers of fine gold, white, or silver coin, coin of billon, or mixed metal, and deniers and mailles of copper.

per Occurrences 3%

The people, from whom taxes might be always extorted at pleasure, paid a good share of this, for the fifth of the three millions of écus d'or was realised from the tax on salt, the thirteenth part from the duty on the sale of fermented liquors, and twelve deniers per pound from the tax on the value of all provisions sold and resold within the kingdom.

Which preposition to use with  deniers