Lenzen attended BR's lectures at Harvard in 1914. "Subsequent to the Harvard experience under the direction of Russell, I was in England during the period from September 1916 to March 1917. I visited Russell in his brother's house, 57 Gordon Square, and was a member of a group of four students who studied mathematical logic with him once a week in London. I came down from Cambridge for these occasions. Our group and Russell were the guests of Mr. Phillip Morrell (I am not sure of the spelling), the pacifist Member of Parliament, and Lady Morrell [sic], just before Christmas time 1916, in Garsington."