To investigate the sick Apis Bull’s quarters in The Lizard’s Mask in Assassin’s Creed: Origins interact with the bowl near the Apis bull. Interact with the cloth on the Apis bull. Interact with the food at the back of the Apis Bull’s quarters. Go outside and interact with the worker standing in the hey. Interact with the green hey near the door. Destroy the door and interact with the necklace on the ground. .
As found on Youtube