original_query: What references does Ristoffel von Grimmelshausen make in their works regarding the excessive number of deaths among the members of the traditional fencing guilds?
query: What references does Hans Jakob Christoffel von Grimmelshausen make in his works regarding the excessive number of deaths among the members of traditional German fencing guilds?
answer: Hans Jakob Christoffel von Grimmelshausen's writings mention the high death toll among members of traditional German fencing guilds, alongside Peter Hagendorf's observations on the devastation of the regions where these guilds were active during the Thirty Years' War.