The collection presenting is a rather variegated one, a miscellany. It contains postcards written in Hungarian to the young violonists Adila (nickname for Adrienne) and Jelly Arányi between 1902 and 1907, letters to their youngest sister, pianist Titi (nickname for Hortense), from the early 1920s, two Hungarian letters to the ethnomusicologist Béla Vikár and one to the pianist Ernő Balogh, German letters to the pianist Gottfried Galston and to the British composer Philip Heseltine (alias Peter Warlock) from 1920 and 1921, respectively. Three letters in French were written to the musicologist Henry Pruničres and Robert Bernard (both of them chief editors of La Revue Musicale) in the 1920s and 1930s while letters, some of them previously unpublished, were addressed to one of Bartók's most devoted American pupil Wilhelmine Creel from the late 1920s and early 1940s. The Hungarian letters are published in English tradition side by side with their original texts.