Letter signed by Rebbe Yosef Yitzchak Schneersohn - the Rayatz of Lubavitch. Brooklyn NY, 6th Elul 1949.
Typewritten on the official stationery of Rebbe Rayatz, with his signature "Yosef Yitzchak", and the addition of several words in his handwriting.
Addressed to R. Chaim Nachman Kowalsky (1892-1978). The rebbe blesses him with good health and abundant livelihood for himself and all his family members, and wishes him success in his work on behalf the Tomchei Temimim yeshivot.
At the end of the letter, the Rayatz added in his handwriting: "All goodness in material and spiritual matters"; signing with his famous signature in the final year of his life, with the letter Yud in Ashuri script.

[1] leaf, official stationery. 21.5 cm. Good condition. Folding marks and creases. Minor marginal tears.

R. Chaim Nachman Kowalsky (1892-1978), prominent Chassid of Chabad in the United States, connected to three generations of Chabad rebbes. Originally a Chassid of Kotsk, he was drawn to Rebbe Rashab and studied under him.
In the late 1920s, he immigrated to the United States where he was involved in communal work, spreading Chassidut, raising funds for Chabad yeshivot and rescuing Chabad students during the Holocaust. He was associated with the Rayatz, and after the latter's passing, he became very attached to the Lubavitcher Rebbe.
His son, R. Sholem Ber Kowalsky (1920-1997), Chassid and Chabad activist, rabbi of Young Israel in New York and a leader of the Rabbinical Council of America (RCA) during Rabbi Joseph B. Soloveitchik's tenure as its president. He served as rabbi of Hillcrest NY for thirty years, where he established many Torah institutions. He founded Ezra, an organization assisting Russian Jewry behind the Iron Curtain. He would consult the Lubavitcher Rebbe on every issue pertaining to his communal work, and received the latter's detailed guidance. In 1996, he immigrated to Eretz Israel, settled in Jerusalem and worked in the Chief Rabbinate of Israel until his passing.

14 letters, receipts and various paper items from Rebbe Rayatz and the Lubavitcher Rebbe, and from Chabad figures and institutions in the United States. Otwosk and New York, 1938-1964.
1-4. Four letters from Rebbe Yosef Yitzchak Schneersohn - the Rayatz of Lubavitch. Otwosk, 1938.
Three of the letters are typewritten on the official stationery of the Rayatz, and one on the stationery of the rebbe's secretariat. The letters are signed by the secretary R. Yechezkel Feigin (one letter with his photocopied signature); two letters are stamped "Secretary of the rebbe of Lubavitch, R. Yechezkel Feigin". Two of the letters were sent to R. Chaim Nachman Kowalsky, and the other two to R. Avraham Shlomo HaKohen (of Chachersk?).
5. Letter from the secretary R. Yechezkel Feigin. 21st Iyar 1938.
Typewritten on the official stationery of the rebbe's secretary, R. Yechezkel Feigin, with the latter's signature Addressed to R. Chaim Nachman Kowalsky, with a report of the poor state of health of the Rayatz and a description of Passover in the rebbe's presence.
6-7. Two letters from Rebbe Menachem Mendel Schneersohn - the Lubavitcher Rebbe. 28th Nissan 1953 / 18th Shevat 1962.
Typewritten on the official stationery of the rebbe's secretariat, one signed by the secretary R. Chaim Lieberman (with ink stamp of the rebbe's secretariat) and the second signed by the secretary R. Shalom Menachem Mendel Simpson. Addressed to R. Chaim Nachman Kowalsky.
8. Envelope with letterhead of the Lubavitcher Rebbe. Sent to R. Sholem Ber Kowalsky in 1964.
9-14. Six receipts from Chabad institutions for donations received from R. Chaim Nachman Kowalsky in 1956-1959.
Size and condition vary.

Letter of good year wishes from Rebbe Menachem Mendel Schneersohn - the Lubavitcher Rebbe, with his signature. Brooklyn NY, end of Elul 1953.
Typewritten on the official stationery of the rebbe, with his signature and the addition of one word in his handwriting.
Addressed to R. Chaim Nachman Kowalsky (1892-1978), with good year wishes.
At the end of the letter, after "with blessings", the rebbe added in his handwriting: "for success".
[1] leaf, official stationery. 21 cm. Good condition. Folding marks and creases.

Letter of good year wishes from Rebbe Menachem Mendel Schneersohn - the Lubavitcher Rebbe, with his signature. Brooklyn NY, Elul 1958.
Typewritten on the official stationery of the rebbe, with his signature and the addition of one word in his handwriting.
Addressed to R. Chaim Nachman Kowalsky (1892-1978), with good year wishes.
At the end of the letter, after "with blessings", the rebbe added in his handwriting: "for good tidings".
[1] leaf, official stationery. 21.5 cm. Good condition. Folding marks and creases. Stains, including ink stains.

Letter of good year wishes from Rebbe Menachem Mendel Schneersohn - the Lubavitcher Rebbe, with his signature. Brooklyn NY, Elul 1961.
Typewritten on the official stationery of the rebbe, with his signature, and the addition of two words in his handwriting.
Addressed to R. Chaim Nachman Kowalsky (1892-1978), with wishes for a good year.
[1] leaf, official stationery. 21.5 cm. Good condition. Folding marks and creases.