Cyphers
Letter From Sylvia

Warning This Section Does Contain Spoilers For Solving Cyphers For Episode Three

Sylvia's letter contains symbols from an ancient language. After some research we find this is the old Persian form of the Cuneiform written language and we have a hint from Sylvia in her letter to this language by her telling us of Babylonia. See the chart below for a list of the alphabet:

After using this chart to decode the written message in Sylvia's letter, we come to the message:

Wait By Crafts Rm Windw

There is no letter "O" in this written language so this translates to:

Wait By Crafts Room Window