This article reviews the interactions between Russell and the English mathematician Max Newman. The most substantial one occurred in 1928, when Newman published some penetrating criticisms of Russell’s philosophy of science, and followed up with two long letters to Russell on logical knowledge and on the potential use of topology in physics. The exchange, which opened up some issues in Russell’s philosophy that he did not fully cope with either at the time or later, is transcribed here. Their joint involvements (...) with the Royal Society of London are also recorded. (shrink)