Riga, Yom Kippur 5690 [1929]

From a letter by Reb Elyeh Chaim Althoiz to the Friediker Rebbe, Rabbi Yosef Yitzchak Schneersohn (Rayatz), who was visiting the United Sates of America at the time. As is described in the present letter, the Rebbe's family and the chassidim who he left behind were distraught at the prospect of Tishrei without the Rebbe. They were, however, consoled by the presence of the Rebbe's son-in-law and successor, Rabbi Menachem Mendel Schneerson. Free Translation.  

The Yom Kippur service finished later this year in the Rebbe's minyan than ever before, for the Rebbe's son-in-law [Ramash, Rabbi Menachem Mendel Schneerson] became totally absorbed in his prayers and oblivious to anything else during Neilah. A nice while passed before he managed to climb out of his reverie. All of us were filled with pleasure from this very pleasing wait. And as is well known, after Neilah the enthusiasm and ability of every Jewish soul to serve G-d is renewed like the strength of a young eagle.