Madame Calderón de la Barca commented in the mid-19th century that music was the sixth sense of Mexico. More than 150 years away, Mexican music is played, sung and is a reference of national identity in much of the world. From the creation of independent Mexico to the present day, music has been part of the cultural work of Mexican. Throughout the 19th and early 20th centuries, it was disseminated through its graphic representation embodied in sheet music; first handwritten pieces that, perhaps once copied, passed from hand to hand. With the creation of lithography, and gradually with the development of different printing techniques, these were printed and a large reproduction of copies that were distributed throughout the country was achieved. In turn, each score could have a relative ease of re-editing according to the needs and tastes of the public. The score not only served to spread the music, but also to conserve it and allow it to be performed to this day. In the collections of the Francisco Xavier Clavigero Library we have a small but significant collection of sheet music from the nineteenth and early twentieth centuries. These copies of written music attract attention, as they mostly contain beautiful illustrated covers with a wide variety of shapes, themes and techniques, and can be studied from various points of view: graphic, stylistic, aesthetic, in addition to reading and musical interpretation. This book publishes a selection of 120 covers of musical scores, mostly printed, and some handwritten, appearing in Mexico from 186o to 1935. Through each of the covers, we can approach the graphic presentation of music in Mexico.