Born in New York, Lewis Einstein graduated in 1898 from Columbia Universtiy, and received a master's degree in 1899. In 1903 he was appointed by President Roosevelt as third secretary of the American Embassy in Paris; he served there until 1905 and was transferred to London as second secretary in 1906. Lewis worked in several foreign capitals over the next twenty-five years. His last post was that of minister plenipotentiary to Czechoslovakia from 1921-1930. Aside from his diplomatic career, Einstein wrote fifteen books, including The Italian Renaissance in England (1902) and a biography of Theodore Roosevelt (1930). Around 1963, his thirty-two years of correspondence with friend and Supreme Court Justice Oliver Wendell Holmes was made public. The letters covered many topics, ranging from literature, to history and politics, to art--Einstein was also an avid art collector. He died at the age of ninety in Paris.
"Lewis Einstein, Ex-Diplomat, 90." [obituary] The New York Times (6 December 1967).
"Lewis Einstein, Retired Diplomat and Author." [obituary] The Washington Post (6 December 1967).