The collection consists of manuscripts by Sekara and printed materials. The manuscripts primarily deal with Sekara's military career during the Civil War. There is a copy of "Sumskie gusary 1651-1951" (Buenos Aires, 1954) to which various clippings and notes have been appended. In addition, there are a few dozen issues of the journals "The Sentinel" and "Voennai︠a︡ byl ́(The Military Past) dating from the 1950s to 1974.