Primary sources clearly reference Szumka II. Roman Sanguszko Sr. specifically states that Szumka II was not a pure Arabian horse.
Roman Sanguszko Sr.’s history of the stud in 1876 gives the following information on Szumka II: “The black Szumka II was the one that stood out the most from the Hajlan progeny, he came from the mare Polka. Polka was not a pure Arabian mare; her sire of a cherry-bay coat and bought in Vienna, Austria around the year 1790.”
Roman Sanguszko Sr. repeated this account in the Russian version of same text in 1876: “