This summary provides context and key details from the document in 3 sentences:
The document is an excerpt from a novel that provides historical context for the work, noting the author has tried to accurately portray 1774-1775 events in Boston but recognizes minor details may be adjusted for the story. The excerpt then shares a prologue where the main character William urgently seeks out his friend Dr. Joseph Warren late one night, fearing his mother and sister-in-law have taken ill, and they encounter musket fire and screams on their way to William's home, finding his sister-in-law has died and mother is gravely ill.