Has anyone ever seen the thank you card that Milburn Stone Doc Adams sent out after having his attack in the 70's?

Yes, Milburn Stone, who portrayed Doc Adams on "Gunsmoke," did send out thank-you cards after recovering from a health issue in the 1970s. These cards expressed his gratitude to fans and friends for their support during his recovery. Some of these cards have become collectors' items among fans of the show. However, specific details about the card's design or content are not widely documented.