Sentence:  ... each man discharged their péece, and killed the sayd waterman, which forthwith falling downe dead, the <WSD>Sculler</WSD> with much payne rowed through the Bridge to the Tower wharffe with the Lieutenants man, and the dead man in his boate ... 
Meaning of the word marked with <WSD> tags:  One who sculls; an athlete who participates in sculling races.