The note can be found in an apartment building just north of the Vault-Tec University campus in Morgantown. The building and be accessed by the monorail or a door on the street level. The note is on a desk near the breach in the wall after entering from the monorail.
Mommy helped me write this letter to you I hoPe you like it. she is helping me with my letters and sPelling I HOPE YOU LIKE IT
I love you!
This is your dahter