He received a gash on the head by British tax collector John Robinson 's cudgel at the British Coffee House in 1769 .
Otis suffered from increasingly erratic behavior as the 1760s progressed .
Otis received a gash on the head by British tax collector John Robinson 's cudgel at the British Coffee House in 1769 .
Otis suffered from increasingly erratic behavior as the 1760s progressed .