Complex sentence: He then beat Jack Towers the following month at same place and comprehensively beat a fighter called Fry for 50 guineas at Kingston in June 1786, in which instance Fry was badly beaten up and Johnson had barely a scratch on him.
Split into simpler sentences: He then beat Jack Towers the following month at same place, and obtained a comprehensive win over a fighter called Fry for 50 guineas at Kingston in June 1786. In this last instance, Fry was badly beaten up and Johnson had barely a scratch on him.