Ignatius says that he hears something too, and will trail after Strange regardless of what he says, despite the fact that he sounds equally suspicious. Fae are very accustomed to their own bullshit, after all.

They'll find a little mockingbird, sitting on a rock. They're the one that's speaking, yet at the same time... something supernatural makes the two of them feel as if those words hold the same weight as the mystery person they have the voice of.

"Please, don't go any further," they say.