Q:
ancient demetra tablet
A:
Explorer Ket ( http://wiki.guildwars2.com/wiki/Explorer_Ket ) wants this. It is a renown heart-item. naming that giving it to Ket will fill in the renowm heart (most likely the one closest to where you found it). In this case it is for the renown Heart ‘Help Ket investigate the Ruins of Demetra’ ( http://wiki.guildwars2.com/wiki/Help_Ket_investigate_the_Ruins_of_Demetra ).
You can find him near the ruins of holy demetra in Harathi hinterlands (almost bottom- right side)
Arise, ye farmers of all nations
Arise, opressed of Tyria!
Arise, opressed of Tyria!
Its for the priory member near ancient demetra in… I want to say harathi hinterlands? Far west of the zone. You talk to her and she takes the tablet, giving you partial completion of the heart.