Leger

a leger ambassador

Source: wiktionary

Sir Edward Carne, the queen's leger at Rome

Source: wiktionary

The Leger exhibits at one view the accounts with an individual, as it contains on the Dr. [debt] side whatever he has received, and on the Cr. [credit] side whatever he has paid. […] Let each account be posted from the Day Book in its proper place in the Leger. If a mistake be made, let it be corrected by an account in the Day Book, clearly stating the correction, and then let this account be posted in its proper place in the Leger, that no blot or erasure may disfigure its pages.

Source: wiktionary

[T]his city of "merchants, whose counting-houses are their churches, whose money is their God, and whose legers, (defaced legers, of course, the delegate from Indiana will understand me,) whose legers are their bibles."

Source: wiktionary