His next patent represented the body of his aeronautical work that he spent the rest of his life researching; his rocking wing concept of lateral control. Applied for on 1 January 1909, the complete specification is dated 23 July 1909 and was left with the Patent Office a day later and accepted on 16 December that year. Patent No.47 of 1909 comprises three pages of descriptions and a single page with an illustration of the rocking wing concept as applied to a theoretical aeroplane.