However, the rebbe my father-in-law asked me to tell him all of my innovations... - a long historical letter ...

However, the rebbe my father-in-law asked me to tell him all of my innovations... - a long historical letter from the  Rabbi Shmuel David HaLevi Yungreiss son-in-law of his uncle Rabbi Asher Anshel Yungreiss author of Menuchat Asher

נשלח אל רבי אברהם פראגער.

שלשה עמודים

כותב אודות דירתו סמוך לחותנו בטשענגער

Rabbi Shmuel David HaLevi Yungreiss, (1838-1892), son of Rabbi Shraga Feish Yungreiss (Av Beit Din of Stężyca, disciple of the Chatam Sofer), and son-in-law of his uncle Rabbi Asher Anshel Yungreiss, (Av Beit Din of Csenger, author of Menuchat Asher, famed as a holy wonder-worker). Studied at the Pressburg Yeshiva with the author of the Ktav Sofer who granted him semicha for the rabbinate. From 1868, he served in the Balassagyarmat rabbinate where he established his Yeshiva Gedola. He sat wrapped in his tallit and crowned with tefillin until noon and would then deliver his discourses to his disciples. His diligence was legendary and even while walking from place to place his lips would murmur words of Torah. He was also well known for his genius and holiness and always conducted himself with piety and halachic stringencies. He travelled twice a year to Siget to bask in the presence of the Rebbe, author of Yitav Lev and after the latter's death he travelled a few times to Mukacheve to the Rebbe, author of Shem Shlomo [once, when he received an Aliya to the Torah in the Beit Midrash of the Mukacheve Rebbe, the author of Darkei Teshuva whispered to his father the Rebbe, that the motions of the Rabbi of Balassagyarmat show that he studies Kabbalah. His father answered him, "I have already discussed revealed and hidden Torah with the Rabbi of Balassagyarmat and I know that he is greatly erudite also in the secrets of the holy Torah"]. Some of his Torah novellae were printed in Jerusalem in 1958, in the first volume of responsa of the Maharsheda.