Sentence:  Now the Bard, glad to get an audience, […]/ stuck fast with his first Hexameter,/ Not one of all whose gouty feet would stir./ But ere the <WSD>spavined</WSD> Dactyls could be spurred/ Into recitative, in great dismay/ Both Cherubim & Seraphim were heard/ To murmur loudly through their long array […] 
Meaning of the word marked with <WSD> tags:  Old, worn out, obsolete (said figuratively of a person).