Sentence:  [T]he negotiation goes on <WSD>swimmingly</WSD>, inasmuch as there is no prospect of its ever coming to a close. Nothing is lost by these delays and obstacles but time; and in a negotiation, according to the theory I have exposed, all time lost is in reality so much time gained; with what delightful paradoxes does modern political economy abound! 
Meaning of the word marked with <WSD> tags:  In a very favorable manner; agreeably; without difficulty; successfully.