Came across this letter online recently. I received the identical letter from Marvel Comics when I was around eleven years old — in 1984 — after I sent them some of my drawings. It is something I treasured, lost, and now rediscovered, so happy I found it. I thought it was so encouraging!
Original image found at https://bigglee.blogspot.com/2011/01/1985-marvel-comics-rejection-letter-jim.html