Sentence:  Upon this warrant shall you have access / Where you with Silvia may confer at large; / For she is <WSD>lumpish</WSD>, heavy, melancholy, / And, for your friend's sake, will be glad of you; / Where you may temper her by your persuasion / To hate young Valentine and love my friend. 
Meaning of the word marked with <WSD> tags:  Without energy, lethargic.