The story is based on genuine events, but the author’s features are given to the images of both young naturalists. A. N. Formozov went to capercaillie currents in the Volga region not as a boy, but as a young man in 1921 and 1922, once with his father, and the other with his friend Georgy Dmitrievich Shaposhnikov (1902-1963), later an engineer in the aviation industry. It is curious that in the archives of A. N. Formozov there is a clipping from the newspaper "Nizhny Novgorod Commune" with the article "Foresters are murderers." It describes approximately the same thing that the heroes of the story experienced. This happened after the revolution, but in the same Trans-Volga forests where A. N. Formozov hunted during his high school years. Source: The text of the book was translated from the original language using an artificial intelligence program. For the most part, the translation of the text is of very high quality, but in some cases, due to the imperfection of the technology, there may be incorrect phrase translations in the text, as well as single words and expressions may not be translated.