Janácek's second string quartet, "Intimate Letters", is regarded as a highlight of the modern string quartet literature. It was written during the composers last year of life, between January 29th and February 19th, 1928, inspired by the ageing Janácek's exceptional love for Kamila Stösslová. The Moravian Quartet devoted themselves to this impressive work; Janácek attended a total of three of their rehearsals in May and June 1928. This had several consequences, including his abandoning his original idea of using a viola damore.
After Janácek's unexpected death on August 12, 1928 the uncertain genesis of the work became the greatest problem of the Intimate Letters: the surviving copies were not definitively authorized.