You could paraphrase #1 as: The means by which he took his life. The means = tools or method. #2 is not grammatically correct.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
JumanahThe rule whereby it's allowed means the rule by which something is allowed.Am I right?Yes, you are.
JumanahI like the cat of which she was afraid. Here, the usage of "of which" is clear to me.But not to me; no one would use that.
JumanahBut "I'm giving her a lot of homework of which there's one example"Is not clear?No, that is not clear.