Thank you for the nice words.
As for the chariot race: I assume you don't have all the info needed yet. Sepia should have said so, if she gathered it all. There need to be 5 clues on the sheet as well as 5 colored chariot icons on the right. If that is not the case, you missed some dialog or haven't found the list of participants. Once you have it, you can click on the chariot icons and place them in the right order on the left side.