Original sentence: As well Rabbi Chaim Noach Levin wrote in his notes on Megillas Yuchsin that he heard directly from Rabbi Yosef Shaul Halevi who was the head of the Rabbinical court of Lemberg that when he wanted to go see the remains of the golem, the sexton of the Alt-Neu Shul said that Rabbi Yechezkel Landau, who died in 1793, had advised against going up to the attic after he himself had gone up.Rabbi Menachem Mendel Schneerson (the last Rebbe of Lubavitch) who wrote that his father-in-law told him that he saw the remains of the Golem in the attic of Alt-Neu Shul.Ultra-Orthodox writers, on the other hand, claim that there is earlier evidence of the golem-narrative
Edited sentence: As well Rabbi Chaim Noach Levin wrote in his notes on Megillas Yuchsin that he heard directly from Rabbi Yosef Shaul Halevi who was the head of the Rabbinical court of Lemberg that when he wanted to go see the remains of the golem, the sexton of the Alt-Neu Shul said that Rabbi Yechezkel Landau (author of the responsa Nodeh BiYehuda) had advised against going up to the attic after he himself had gone up.However, this supposition is refuted by Rabbi Menachem Mendel Schneerson (the last Rebbe of Lubavitch) who wrote that his father-in-law told him that he saw the remains of the Golem in the attic of Alt-Neu Shul.Rabbi Landau passed away in 1793 so there is a written record of an oral source from earlier than 1837