The items in this collection can all be found by collecting ground-spawn fluttering pages with a ! over them (and often as mob drops or in objects) in the zones listed unless noted differently below in the list of Items in this Collection.
When the collection is complete, you can turn it in to any Collector NPC for your reward and a very nice chunk of experience.
Items in this Collection
Page 5: Clickable rock at 221.70, 220.46, 358.87 just to the left of the opening to Vaults of El'Arad.
Page 6: Random Ground Spawn
Page 7: Clickable nest at the end of the Windgazer Hideout in Barren Sky at -662, 0,-505