Actually there was no takeover according to him. The tall attractive Marguerite was the mother of Lee Oswald and the short heavyset one was the mother of Harvey Oswald. When the American Lee was taken out of the picture the Eastern European Harvey and his mom became LHO of record per Armstrong.
Today, what remains, are an overwhelming number of FBI reports relating to the Marguerite Oswald impostor. Beginning in 1955, as the number of FBI reports relating to Marguerite Claverie Oswald diminished, the number of FBI reports relating to the Marguerite Oswald imposter increased. By the spring of 1959 the Marguerite Oswald impostor became the one and only "Marguerite Oswald," mother of the young man who would soon "defect" to the Soviet Union
It seemed like you disputed my term of taking over for in referring to this quote Maybe your right, but so far I would think that is a reasonable summary of what is written here there was a matching correspondence between the changing frequency from Lee towards Harvey at this time So if I did not include that point that is a fair point