 This would argue for Italian descent; but it does not agree with the fact that Case called himself "Shapiro," as Bloch has conclusively proved.After serving as chief rabbi of Lemberg, Case became city rabbi of Posen, while Mordecai ben Abraham Jafe was the district rabbi of Greater Poland.Although Case apparently left no writings, he was one of the first Talmudic authorities of his time, as may be seen from Benjamin Aaron Solnik's "responsum" No.