Thank you. This is all good to know and will help when I plan future adventures.
With regards to the animals, they do hint at what they require (The stag hints at leadership and lineage, therefore the 'Pharaoh mask', the Owl speaks of silver discs 'silver coins' and the Scorpion speaks of coloured glass 'coloured gems'). These are the only 3 'treasures' in the game.