TLS as president, one page, 6.75 x 9, White House letterhead, June 28, 1991. Letter to Deke Slayton. In full: “From one ‘high performance engine’ to another, many thanks for your thoughtful letter and for sharing with me your experiences having atrial fibrillation. I’m feeling great, back up to 100 percent. You understand how good it feels to be running again, and I’m going to take your advice to stay with it.” Bush adds a brief handwritten postscript to the bottom, signing “George.” In fine condition, with a mild block of overall toning from previous display. On May 4, 1991, while jogging at Camp David, President Bush experienced shortness of breath and chest tightness. He was immediately rushed to the hospital where he was diagnosed with atrial fibrillation. This letter brings to light a common debilitating condition shared by the president and astronaut, and Slayton’s willingness to see Bush through this tough time after his diagnosis. RRAuction COA.