The publication includes a translation of letters from the extensive correspondence between the director of the Pulkovo Observatory O. V. Struve and the director of the Brera Observatory in Milan G. V. Schiaparelli. The publication of the correspondence makes it possible to see the commonality of scientific interests of two astronomers, whose main attention is paid to the problem of studying the movement of stars - members of binary and multiple stellar systems. The letters give an idea of the morals and customs that reigned in the scientific communities of Europe, of the multifaceted activities of O. V. Struve and J. V. Schiaparelli, of the scientists with whom they maintained scientific, business and friendly ties. The comments provide basic biographical information and explanations of special terms. The book is intended for astronomers, historians of science, as well as for readers interested in the personalities of scientists who have made a huge contribution to the study of the starry sky.