lol this was pointless i found clue 1 but if anyone wants to know this is how you get all the clues:
Clue 1: after completing the bandit hostage quest
Clue 2: after completeing the traders lost brother quest
Clue 3: after completing the assasin attaks(killing all of the assasins after you)
Clue 4: win at the archery contesyt in knothole glade
Clue 5: find in a chest at orchard farm
Clue 6: find in a chest on windmill hill
and for anyone whos wants to cheat :P the treashures between a barn wall and a bail of hay in orchard farm warning: the treashure wont do andy damage (its a weapon called frying pan) or be able to ave augmentations unless u have all the clues befire you dig it up so i reccomend getting the clues first