This series contains documents that are connected with the unfinished work on the "Theory of emotions' (Vygotsky in The collected works of L.S. Vygotsky Vol. 6, Scientific legacy. Plenum Press, New York, 1999) and dates from approximately the end of 1931 to early 1933. They are difficult to read both because the text borders on inner speech and because it contains gaps, parts that are illegible, and crossed-out parts.