Help with a Code

I'm new and I hope I am posting this in the right spot.

I encountered a code that I have been trying to decipher but can't and was hoping I could get some assistance.

The first part (which I already deciphered) consists of symbols found in the pigpen (or tic-tac-toe) cipher. The deciphered message reads "I passed through the gates and played at the fair."
The second part of the message is a series of letters which reads: Sthiyhuf Ebz thnyu quhhcmdy or rotbwx

Additionally,
1) The first cipher helps decode the second.
2) A total of three ciphers are used (one of which is the pigpen cipher)
3) A key is often called a password.

Can anyone solve this?