a marthy peninsula in the county of Norfolk, opposite to King's Lynn, almost surrounded with the Ouse and other navigable rivers, and an arm of the sea. It seems formerly to have been recovered out of the ocean, from whose inundations it could never be altogether defended; and in Sir Henry Spelman's time it suffered two general ones, viz. one from the salt water, the other from the freshes; by the last Marshal, of which the inhabitants suffered 42,000l. damage. It contains about 30,000 acres, which turn to more profit by grazing than ploughing. It is about 10 miles in the widest place, and has no less than 111 brick bridges. The commonage of it belongs to seven villages that surround it. The air is so unhealthy, that an ague is commonly called the Marshland bailiff.