Sentence:  Nobody can doubt, particularly if "country" be taken into the consideration, that the grinders and retailers of <WSD>"Mundungus</WSD>" were among the author's "encouragers". … that "he" had told the "Secretary of the Treasury", that if the <WSD>"Mundungus</WSD>" was taxed, “he would be "damn'd" if ever "he forgave him", while he had an existance.” 
Meaning of the word marked with <WSD> tags:  Poor-quality tobacco with a foul, rancid, or putrid smell.