Hodgins and Booth paused to listen, and heard nothing but birds singing in the darkening forest. Night was approaching quickly and Booth knew if they didn't find anything soon, he and Hodgins would have to set up camp for the night. Refusing to give up, Booth climbed past the footprints and scuff mark. Ten feet more and he stopped to yell again.

This time Hodgins added his voice, the sound twice as loud as before. Still, there was no answer.

It wasn't until the third yell, when Booth could see the top of the mountain in the distance, that he thought he heard something out of place. It was almost drowned out by the sound of singing birds, and Booth was afraid his mind was playing tricks on him.

Holding his hand out, he and Hodgins stopped where they stood. Booth dropped his pack behind him, wanting to be ready to run if he was right. Hodgins did the same and together the two men stood at attention, listening for the smallest sound.

When the sound wasn't repeated, Booth motioned for Hodgins to go one way while Booth worked his way further up the mountain. The trees were thinner here and the rock cliff ahead looked like it was recently broken.

Five steps they walked, before silent communication had them both stopping and yelling again. Again, both men paused to listen.

Booth had a lot of good memories in his life, the birth of his son, meeting Bones, but he knew this day would be as memorable as any of them. This was the day Bones' very alive, very tired voice answered him back from the forest.