Final Letter is a scrap in Fatal Frame II: Crimson Butterfly.
Sae dropped this note while being escorted to the Hellish Abyss to be sacrificed. Because of the Hellish Abyss getting impatient for a crimson sacrifice and Yae had run off leaving Sae behind, the Mouners and Priests were getting desperate and had to try the Crimson Sacrifice Ritual with only one person.
This resulted in the Repentance in which Sae and the Kusabi came back and massacred everyone in the village. The repentance was so terrifying for some people they either hid themeles from it in hopes of escaping it only to be found or to take their own lives only for the repentance to keep their soul in the village.
Fatal Frame IIEdit
You came for me after all.
I'm right below you.
I know you might not make it in time,
Fatal Frame II: Deep Crimson ButterflyEdit
So you came, I knew you would.
Now come find me, quickly.
I'm down below here.
I know it's probably too late...