When I left Dora, she continued the school until after the beginning of the Second War, though after 1934 it was no longer at Telegraph House. ...
I spent the summer of 1932 at Carn Voel, which I later gave to Dora. While there, I wrote Education and the Social Order. After this, having no longer the financial burden of the school, I gave up writing potboilers. And having failed as a parent, I found that my ambition to write books that might be important revived.
Source: The Autobiography of Bertrand Russell, v.2,chap.3: China
More info.: https://russell-j.com/beginner/AB25-010.HTM