We quote from the Preface to the volume:-
[Edward Szpilrajn (1907-1976) - who later changed his name to Marczewski while hiding from Nazi persecution] was one of the most distinguished Polish mathematicians. He was a disciple and an active member of the Warsaw School of Mathematics between the two World Wars. Marczewski's life and work after the Second World War were connected with Wroclaw, where he was among the creators of the Polish scientific centre. The scientific output of E Marczewski consists of nearly one hundred research papers and announcements published within the years 1930-1970. Until the late fifties his main fields of interest were measure theory, descriptive set theory, general topology and probability theory. In that period he also published isolated papers dealing with real and complex analysis, applied mathematics and mathematical logic. In the sixties his research interests concentrated on problems connected with the notion of independence in universal algebra and resulted in 17 papers published from 1958.