"The Edge of the Knife" by H. Beam Piper is a science fiction novella likely written in the mid-20th century. The narrative revolves around Edward Chalmers, a history professor with the ability to foresee future events. The story addresses themes of precognition and the repercussions of knowledge about future events, particularly in the context of political upheaval and assassination. In the plot, Chalmers inadvertently reveals his knowledge of Khalid ib'n Hussein's upcoming assassination during a history lecture. This incident leads to significant turmoil for him professionally, as he faces accusations of madness from college administrators and skepticism from his peers. As events unfold, Khalid is indeed assassinated, validating Chalmers' foresight but also complicating his life as a professor. In a twist of fate, the story explores how knowledge of the future can be both a gift and a burden, ultimately leading Chalmers to confront his sanity and the implications of his abilities in a world rife with political tension. (This is an automatically generated summary.)