Description
As you look through the records in this log book, you find a page containing hastily scratched notes and a rough drawing of a Fate Weaver. The notes indicate that Fate Weavers only truly die when the source of their webbing is destroyed. Their corpses must be burnt, or they'll just come back at a later point in the thread of time.
Near the log book is a Portable Incinerator. However, it is only partially fueled. It seems the researchers began their work too late. You'll have to finish it.
Upon completion
Burning the Fate Weavers is the only way of ensuring that their thread of Fate is truly destroyed.