Designing lighthouses ran in the Stevenson family. Thomas Stevenson, lighthouse engineer, was the youngest son of Robert Stevenson, who had designed the famous Bell Rock lighthouse. Thomas and his two brothers acted as consulting engineers to the lighthouse boards of India, New Zealand and Japan. His greatest achievement was the designing of a revolving light, an invention which won him an international reputation. His son, Robert Louis Stevenson, did not follow in the family engineering tradition, and became one of Scotland's most famous writers.