Rhea's Letter is a letter that Rhea wrote and gave to Sheemie, hoping to expose the loss of her virginity to Roland Deschain. She instructed Sheemie to give it to Susan's Aunt Cordelia.

It is signed with Rhea's sigil.

It reads:
''Pure no more!
He's had every hole of her has Will Dearborn
How do ye like it?''