[Voldemort] could hear [Lily] screaming from the upper floor, trapped, but as long as she was sensible she, at least, had nothing to fear ... he climbed the steps, listening with faint amusement to her attempts to barricade herself in ... she had no wand upon her either ... how stupid they were, and how trusting, thinking that their safety lay in friends, that weapons could be discarded even for moments ...
Deathly Hallows - page 281 - Bloomsbury - chapter seventeen, Bathilda's Secret
Harry, in Deathly Hallows, channels Voldemort's recollection of Harry's parents' death during a dream sequence. Voldemort states Lily was without her wand as she hid with Harry in his nursery.
Did I miss something in the text where Lily puts her wand down or is disarmed in some way, or did she really just not have her wand with her?
How did Voldemort know Lily didn't have her wand?
I'd love to see an answer that is within the spirit of canon (the books, JKR interviews, Pottermore, or thoughtful speculation) and consistent with Voldemort's magical abilities and characterization as it is in the books. I'd prefer to avoid wild guesses and ridiculous theories such as:
- Harry was dreaming, so the dream must be wrong!
- Just because it wasn't visible in Lily's hand doesn't mean she didn't have her wand!
- Harry is Voldemort's father!