During the Second World War, while working as a dispensary porter and laboratory assistant at Guy’s Hospital in London, Wittgenstein lodged at 49 Lansdowne Road in Croydon. Having stepped away from his academic post in Cambridge to contribute directly to the war effort, he commuted from this south London address while enduring the Blitz and carrying out demanding, routine hospital duties. Although the original building no longer stands today, the site marks a pivotal period of wartime service during which Wittgenstein consciously sought practical, anonymous labour while continuing to refine his later philosophical ideas in his spare hours.

Captured on the modern street where the house once stood, this recording audibly marks the vanished site of his wartime lodgings. While the everyday traffic, footsteps, and contemporary urban bustle sound markedly different from the Croydon of the 1940s, the ambient streetscape anchors the listener to the exact physical geography he once walked. Even without the original building remaining, the sound acts as an acoustic placeholder, bridging the contemporary city and the quiet, anonymous life the philosopher led during his wartime service.