On 7 November 1927 in Hampstead Rudall became Corder's second wife. By then aged 75, he had retired from the music profession three years earlier. They lived at his house, 13, Albion Road (now Harben Road), South Hampstead, where she continued to live after his death in 1932.[9][10]
By the mid-1930s Rudall was a professor of harmony and composition at the Royal Academy, while also teaching piano at the Tobias Matthay Piano School. On 9 November 1938 she organized a concert of her compositions at the Queen Mary Hall, Great Russell Street, including two String Quartets.[11] She became involved in the running of the Society of Women Composers[12] and this resulted in performances of her music at Society concerts, such as the Phantasie for violin and piano played in July 1934,[13] and a string trio in November 1950.[14] She died in May 1960, aged 79.
In her 1950 entry for Who's Who in Music, Rudall listed more of her compositions, now all unknown, including three String Quartets, a Piano Quintet, a Cello Sonata, To a Passer By for chorus and orchestra, and Ballad of Summer Waters, for female voices. There are published song settings of Robert Bridges' The Robin and Christina Rossetti's Spring Quiet, and the Spring Pastoral for piano four hands.[15]