found: Korespondencja Heleny Modrzejewskiej i Karola Chłapowskiego, 1965.
found: Autograph letters signed and unsigned from Charles Bozenta, New York, Philadelphia, and "Arden", California, to various people, 1882-1904
found: Ci wielcy Polacy to nasza rodzina, ed. 3, 2008, [via www, 2008 October 22] :p. 304 (Chłapowski Karol Bodzenta (1840-1914) publicist)
found: Guide to the Helena Modjeska Collection (Online archive of California), [via www, 2008 October 22](Modjeska married Karol Bozenta Chlapowski September 1868; adopted the name of Count Charles Bozenta Chlapowski upon his arrival in the United States; Count Bozenta)