Based on the search results, there appear to be multiple historical figures named Archibald Stirling of Keir. It is difficult to determine which "Keir Archibald" is referenced in the context "Motor Doping IS Possible. We've Done It." without additional information.
One notable Archibald Stirling of Keir (1769-1847) was a Scottish landowner and planter in Jamaica. He significantly altered the lands of Keir and Cawder. He married Elizabeth Maxwell and had children, including Sir William Stirling-Maxwell.
Another Archibald Stirling of Keir (1867–1931) has a bronze bust made of him.
Given the context, it's possible "Keir Archibald" may refer to a person involved in sports, perhaps in a biological or advisory role. In a column by Katie Archibald, she mentions asking her biology teacher, Mr. Quinn, about blood doping after her father explained the concept to her. Without more information, it's impossible to definitively identify the "Keir Archibald" mentioned.
