An Update of the Paper, ‘On known and less known relations of Leonhard Euler with Poland’ (DOI: 10.4467/23921749SHS.16.005.6148)

In this note we publish a short letter from Leonhard Euler’s son, Johann Albrecht Euler, the Secretary of the Imperial Academy in St. Petersburg, to Marcin Poczobutt-Odlanicki, the Vilnius astronomer. The fate of this letter seemed unknown, but we know its content now. The main news in this correspondence was the discovery of a comet by the astronomer Anders Johan Lexell.