Sentence:  But though the War was proclaim'd, and Preparations accordingly made for it, the Expectations from all receiv'd a sudden <WSD>Damp</WSD>, by the as sudden Death of King "William". 
Meaning of the word marked with <WSD> tags:  Dejection or depression; something that spoils a positive emotion (such as enjoyment, satisfaction, expectation or courage) or a desired activity.