Lord Braybrooke's private Railway running through the woods forming part of the historic Audley End Park, Saffron Walden.
In his autobiography Rule of Thumb – the life story of an engineer, Curwen recalls their first meeting where he and Lord Braybrooke ‘talked and talked about railway locomotives’. The mutual respect between the two men was clear, Curwen himself thought that Lord Braybrooke should have been an engineer, such was his appreciation of the challenges in creating engines from scratch and the inevitable teething problems along the way. For his part, Lord Braybrooke credited Curwen with making the railway at Audley End a success, as he carefully designed and built hard-working and robust locomotives necessary for a commercial operation.
Curwen was to build nine engines in total for Lord Braybrooke’s miniature railway. As Lord Braybrooke wrote in the foreword to Curwen’s autobiography, ‘We both love trains and always will!’.