"I will bet a hundred merks that is Drummond"

Merk from the reign of Charles II, minted in 1671 at Edinburgh
GNU Free Documentation LicenseMerk from the reign of Charles II, minted in 1671 at Edinburgh - Credit: Classical Numismatic Group, Inc.

A merk was a Scottish silver coin in circulation from the late 16th century into the 17th. Its value was 13 Scottish shillings and four pence.