Hi Bev, Thanks for your message. My apologies for the error with the dates in my previous post – you're right, it would definitely send you down the wrong path! Its likely because, following the initial post, we've been trying to piece things together, and we're now convinced it must have been after the 1950s–60s. The mention of Bangladesh (formed 1971) and believing that Joan went too strongly suggests a later period, specifically after Bangladesh was formed from East Pakistan. This makes us think he wasn't involved in the colonial railway works, but rather something afterwards, possibly for Bangladesh Railways (formerly East Pakistan Railways). We've learned that the country still needed British knowledge and expertise following independence, so we're wondering if that might have been his role. Thanks again for your patience as we try to figure this out! All the best, Chris