Aurelia Plath's shorthand annotations on the Lilly Library materials, cataloged and transcribed, are now available to all on the open-scholarship platform at Marquette University (my alma mater). The Excel files and short "keys" to each (PDFs) can be accessed and downloaded here. Take your time; there's a lot.
Marquette University Libraries digital librarian Heather James, herself a poet and Plath fan, welcomed the Aurelia Plath materials and skillfully uploaded the files. You must agree the Excel files are handsome and easy to use. Please credit Catherine Rankovic when referencing my work in your work. The Estate of Aurelia S. Plath granted me permission to release these transcriptions for scholarly purposes. Contact me at aureliascholar [at] gmail.com with questions re the shorthand.
Peter K. Steinberg kindly published a notice on his SylviaPlath.info blog that this project was ready.
I'm grateful that this project chose me. Currently I'm creating a chronology of Aurelia's life, gathering biographical information from every available source. It bears saying (because I've never heard it said) that Aurelia is an important key to Sylvia.