The Apophenic Goblin Discovers grimoire
Of all the things goblins have categorized — and they have categorized many things, including dust by mood — grimoire resists classification more vigorously than most.
There exists, in the goblin underground, a specific bar where conversations about grimoire are forbidden. The reason is not given. The bouncer is a goblin nobody has seen smile.
The archive Manifestation
Goblin testimony on archive is notoriously inconsistent — not in the details, but in the tone. Some goblins describe archive with reverence; some with derision; some with the studied neutrality of a goblin who has been burned before. All testimonies are filed and kept.
The Goblin Verdict on grimoire
The Goblin King's court has issued a final ruling on grimoire: it is real in the way that matters, which is to say it appears in at least three goblin dreams per week. This is considered definitive proof of its existence in the goblin ontological framework.