So far ...
Weresaur Lair - 1st screen; put the 3 stones on the cigarette butts
Counts Castle
Room located through this door...
Move two barrels of rum onto white dots behind the Meade barrels
All hidden stuff is marked in blue on the wiki maps. Many of them this event. https://bit.ly/2KLgycE
Turalyon Stones don't do anything necessary for the quest but you'll get a hidden bonus if you put them on the footprints as advised above.
Roeland All hidden stuff is marked in blue on the wiki maps. Many of them this event. https://bit.ly/2KLgycE
Also Challenge 1 Suitcase bonuses: https://forum.pixelfederation.com/diggysadventure/d/178991-suitcases-in-1st-players-challenge/13
