Final answer:
The provided excerpts do not describe the scene from 'Arsenic for Tea' involving Daisy and Hazel in the library, thus an accurate description of what they witnessed cannot be given.
Step-by-step explanation:
The events described span across various narratives, each with a different setting and plot. These excerpts do not pertain to 'Arsenic for Tea' where characters named Daisy and Hazel are involved. The excerpts include a mix of scenarios, such as a house and library burning, silent secretive household servants, a fierce discussion on the Confederacy, and even a futuristic nursery. Unfortunately, the specific scene involving Daisy and Hazel hiding in the library and what they witnessed in 'Arsenic for Tea' is not described in these excerpts. Therefore, it's not possible to provide an accurate account of what they witnessed in this context.