fenny

“The fenny has dried up,” Mr. Kenwood said.

From New York Times ● Feb. 4, 2018

For instance, wooded spots must be visited if you are to take certain of the Fritillaries, oak woods for the Purple Emperor and the Purple Hairstreak, fenny districts for the beautiful Swallow-tail, and so forth.

From Butterflies and Moths (British) by William S. Furneaux

Specimens of these old bone skates are occasionally dug up in fenny parts of Great Britain.

From Harper's Young People, January 27, 1880 An Illustrated Weekly by Various

Around the city there is an extensive fenny plain, which has been greatly improved and cultivated by the Dutch; but to the east it still remains encumbered by woods and marshes.

From A General History and Collection of Voyages and Travels — Volume 10 Arranged in systematic order: Forming a complete history of the origin and progress of navigation, discovery, and commerce, by sea and land, from the earliest ages to the present time. by Robert Kerr

Finsbury Fields: the fenny or marshy ground lying north of the Moorgate of the old City walls.

From The History of London by Sir Walter Besant