The MotorSport magazine website is running a number of articles about Jim Clark this week, leading up to the 50th anniversary of his death on Saturday. As this is the website you don't need a subscription to the magazine to read them. They are kind-of linked together but there doesn't seem to be a proper index. Start here: https://www.motorsportmagazine.com/opinion/f1/jim-clark-understated-genius
If you get the chance to visit the museum in Duns do go, very understated but a lot of stuff for a small place.