Different repositories and reading rooms where you will consult archives and special collections will have different procedures for requesting and accessing material.
Vague request
Dear Archives/Library Staff,
I would like to see the John Cage collection. Can I make an appointment for June 3, 2022? Thank you.
Detailed request
Dear Archives/Library Staff,
I would like to request to see box 6, folders 1-4 of the New York Mycological Society (NYMS) Newsletter ca. 1980-1992 from the John Cage Mycology Collection. Would it be possible to schedule an appointment for June 3, 2022 to view these items?
Read and listen carefully to all instructions and policies provided by staff, and never hesitate to ask questions if you are unsure about something -- they're there to help!
It's important to keep track of the bibliographic/citation information of the material you are consulting.
If photography is permitted, it can be helpful to take a photo of the material/item with the folder/box description.