Bill Single
A New Law Dictionary and Glossary · Alexander M. Burrill · 1850
A New Law Dictionary and Glossary
and PENAL. A written engagement under seal for the payment of money, either on demand, or at a future day, formerly in common use; the penal bill being framed with a penalty, and the single bill, (which was the more usual form), without. Cro. JSliz.
548. Whishaw.
Single bills are now, however, superseded bjr the modem bills and notes, and penal bdls by bonds or obligations.