At the site of the soldiers death you need to examine the blood patch:

The bottles:

Examing the Bottles in The Beat of White Orchard in The Witcher 3 Wild Hunt

The fireplace:

Examing the Bottles in The Beat of White Orchard in The Witcher 3 Wild Hunt

And the footsteps leaving the area:

Examing the Bottles in The Beat of White Orchard in The Witcher 3 Wild Hunt

Follow the footsteps by jumping over a bridge, climbing up some cliffs and jumping over the gap. At the griffin’s nest you just have to examine the dead griffin.