Ben Levi –
The specific reason they did not sign that Kol Koreh is in order to prevent people from BP interfering in Flatbush.
Well they did. Lodz had shishim ribo by 1931. When they established the Odessa eruv the assumed that it contained shishim ribo.
Bube mases. The other side of the Vistule River was called Parga not Warsaw. Warsaw had shishim ribo by the year 1900. Prior to the war there were over a million people on the Warsaw side of the river. I know Warsaw is a major problem for those who oppose the eruv.
Sorry I believe the Naroler rav more than them. In any case, it makes no sense that a father would express anger about his son to others.