Around this time, Churchill's wife Clementine partnered with Lindemann for a charity tennis match. Although the two men had very different lifestyles, they both excelled at a sport: Churchill's was polo. Lindemann's ability to explain scientific issues concisely, and his excellent flying skills, probably impressed Churchill, who had given up trying to earn a pilot's licence because of Clementine's grave concerns. They became close friends and remained so for 35 years, with Lindemann visiting Chartwell more than 100 times from 1925 to 1939. Lindemann opposed the General Strike of 1926, and mobilised the reluctant staff of the Clarendon to produce copies of Churchill's anti-strike newspaper, the "British Gazette". Lindemann was also alarmed and fearful of political developments in Germany.