Sentence:  Next a marsh, it would seem, and now mere earth / Desperate and done with; (so a fool finds mirth, / Makes a thing and then mars it, till his mood / Changes and off he goes!) within a <WSD>rood</WSD>— / Bog, clay and rubble, sand and stark black dearth. 
Meaning of the word marked with <WSD> tags:  A measure of land area, equal to a quarter of an acre.