"Search the Attius Farm for clues" is an objective in the quest "March of the Dead" in Skyrim: Dragonborn.
Walkthrough[edit]
Captain Veleth asks you to search for clues in the Farm
The clue is in one of the Ash Piles that were left behind by Ash Spawn.
One of those piles will have in it a note, called "Declaration of War"
Take this note
Tips and Hints[edit]
The quest marker should lead you to the correct Ash Pile. If the quest marker is not taking you there, make sure you have the March of the Dead quest marked as active. If you are still having problems, just keep searching the Ash Piles one by one and looting everything
This is what you are after: