Marshalsea

n.

1.

The court or seat of a marshal; hence, the prison in Southwark, belonging to the marshal of the king's household. Court of Marshalsea a court formerly held before the steward and marshal of the king's house to administer justice between the king's domestic servants. - Blackstone.

MARSHALSEA, English law. The name of a prison belonging to the court of the king's bench.