The form mrkws of the Istanbul manuscript is certainly a miswriting of a spelling variant of jārkūn.

[…] that could unbarb the arrow of malice […]

What is the work done by a current of 5 Megafarads per second through a resistance of 10 Ohms?

Among the many kinds of printed materials described by Hymes are political reports, printed handbills, pamphlets, posters, monk ordination certificates, paper money, and even palmable examination cheat books.