What secrets will Catherine find out about Peter?

She learns of Peter's mother, who is mummified and kept in a glass case because Peter refused to bury her, and of her harshness towards him. Catherine is unable to convince Orlo to cooperate, but he keeps her secret.

What’s next from secondary?

By the way, the number sequence is: 1st place = decimal number, 2nd place = binary number, 3rd place = ternary number, 4th place = quaternary number, 5th place = quintal…