Correspondence Correspondence to Alexander and Dorothea Farquharson including a letter to Alexander from the London School of Economics approving his application to become a PhD student, a letter from Annie Jack, Alexander's sister, congratulating him on his marriage to Dorothea, a biography of Alexander that was to appear in the Biographical Encyclopedia of the World, a letter from an Austrian, Herbert Grau, thanking the Farquharsons for a Christmas cake, a letter from The Engineers' Study Group asking Alexander to become President and a letter to Dorothea from the National Froebel Foundation expressing regret that she was unable to lecture on their Summer Holiday Course due to ill health. 25 January 1922 - 26 April 1957