When will Voldemort discover destroyed Horcruxes?

[Eddie]

No: HPFGUIDX 170918

I don't recall having seen this discussed before: At what point in
Deathly Hallows will Voldemort realize that some of his Horcruxes have
been destroyed?

Consider, option 1: Early/Mid-way through DH Voldemort makes the
discovery.  Then it is a race for most of DH... with Harry trying to
find/destroy the remaining Horcruxes before Voldemort can verify which
ones are still safe.  The OOTP will stake out the known hiding places
(the cave (locket), the shack (ring)) hoping to catch Volde there.
Also, Voldemort will have time to wonder how his secret was revealed,
and who revealed it.  This could be bad for Slughorn, who (as far as
Voldemort knows) is the only person who knew about Voldemort's
interest in Horcruxes.

Consider, option 2: At the last moment Voldemort discovers (much to
his horror) that the only piece of soul remaining is the one inside of
him.  It will be one of the last thoughts he has before he is
ultimately destroyed.


Eddie, who thinks (today, but maybe not tomorrow) that Harry will lure
Voldemort into the MOM's "Love Room" wherein Voldemort will be
weakened by the forces there (Love) and Harry will be strengthened. 
In this context Harry will be able to vanquish Voldemort, but Love
(and pity) will so fill Harry that he will not be able to destroy
Voldemort.  This act of Love and Pity will be the last straw and will
in and of itself destroy Voldemort.