Signor Pastrini replied that he had only two rooms and a parlor on the third floor, which he offered at the low charge of a louis per diem.
There are no more uses of "per diem" in the book.
Show samples from other sources
If I stay aboard several days, I must pay 3l. sterling per diemdemurage, nor must the ship stop above eight days more; so that I am unable to engage in this work, unless I would leave the ship, and be reduced to my former condition.