How did Griffin meet his tragic end?

Griffin was beaten to death by a mob of people, which included Kemp, a group a navvies, and some others.

Note, you have questions for The Invisible Man listed under Invisible Man. I answered the first, so I could let you know that you'll have to repost them under the correct title. We are only allowed to answer questions properly categorized. 

how did griffin meet his terrafic end.?