As far as I understand Anderson, his reasonings go like this:
1:The murderer must be bloodstained. So he must have private lodgings.
2: Since he is a local, surely poor, he may be forced to share these lodgings with relatives.
3: His relatives must suspect him.
4: If they suspect him but refuse to give him to the police, then they must be Polish Jews.
Result : The ripper is a Polish Jew, no doubt.
1:The murderer must be bloodstained. So he must have private lodgings.
2: Since he is a local, surely poor, he may be forced to share these lodgings with relatives.
3: His relatives must suspect him.
4: If they suspect him but refuse to give him to the police, then they must be Polish Jews.
Result : The ripper is a Polish Jew, no doubt.
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