How is the fifth treasure found

Hint 1 of 10:

Three Ships begins the chain of clues

Hint 2 of 10:

The Page of Cups is next...

Hint 3 of 10:

The Chant is third in the chain...

Hint 4 of 10:

The Boat...

Hint 5 of 10:

The Chariot...

Hint 6 of 10:

The Thief is last

Hint 7 of 10:

The collected letters must be decrypted