Find All 4 Ghostly Echoes

Journal
''Esmeralda informed me that discovering all four ghostly echoes might enable me to actually speak with the entity, and the resulting bond would inspire it to give me a boon which could aid my fight against something called a geistesser. I should search Highvale Outskirts and find all four ghostly echoes. Since the ghostly echo glows, I may have better luck searching at night.''

Tip

 * In your compass and map will be several Blue Hourglass Markers that have a Task: Find All 4 Ghostly Echoes. Search around these areas to find a Ghostly Echo. The Hourglass Markers will be shown for any Ghostly Echo you have not found yet.
 * Once you have found all 4 Ghostly Echoes, a new Blue Person Marker will show on the compass and map. This will let you know you have found all 4 Ghostly Echoes, and now you need to speak to them.