Sentence:  For aviaries, I like them not, except they be of that largeness as they may be <WSD>turfed</WSD>, and have living plants and bushes set in them; that the birds may have more scope, and natural nestling, and that no foulness appear in the floor of the aviary. 
Meaning of the word marked with <WSD> tags:  Covered or adorned with turf or grass.