Sentence:  The friends of the respective parties, those of the <WSD>"cuckolder</WSD>" on one side, and those of the "cuckoldee" on the other side; and the public (as far as play-house audiences are the public) have "fairly decided in favour of the cuckolder!" What an admirable system of "“public instruction”!" 
Meaning of the word marked with <WSD> tags:  One who commits cuckoldry; one who cuckolds.