Marcia Brown Stern has two folders in the Rosenstein papers. The first is completely dedicated to letters from Plath. I was curious to see this folder as I just always felt there were letters missing...in part because when I was keeping track of the letters Plath mentioned writing, I noted down ten instances of letters to Marcia Brown Stern. Some may have been written a day or two or so after the reference, but it was very hard to determine. Happily, there was one new "letter" in the folder. It was a July 1952 birthday card with a lovely note written in by Plath. There is a chance this card accompanied the 23-24 July 1952 letter from Plath to Stern, as her birthday was on the 28th. But based on the actual letter and its envelope, it might have been sent separately. It is not, I do not think, a part of the Smith archive of her other letters received. So, I cannot help but wonder what happened to it. The real nitty-gritty though falls in the second folder of Stern materials. ...
Sylvia Plath Info Blog by Peter K. Steinberg. The blog of A celebration, this is.