Signatures of the Netziv / Letter by Rabbi Ze'ev Nachum Bornsztain, Rabbi of Biala, to Rabbi Chaim Berlin

Signatures of the Netziv / Letter by Rabbi Ze'ev Nachum Bornsztain, Rabbi of Biala, to Rabbi Chaim Berlin
Two interesting paper items from the archive of R. Chaim Berlin, Rabbi of Moscow and Jerusalem.
· Flyleaf of a book, with various inscriptions, including many signatures of the Netziv of Volozhin [written in his youth, in tiny and large letters]: "Zvi Hirsh Berlin", "Naftali Zvi Yehuda Berlin" [Later, the Netziv used to sign combining his names, Zvi and Yehuda, into one word, but these signatures are from an earlier time with the name Zvi and Yehuda written in two separate words].
· Torn section (unsigned) from a letter of responsum sent to "My dear teacher Ra'avad of Moscow", dated Rosh Chodesh Iyar 1884.
Inspection of the content reveals that this is a letter by R. Ze'ev Nachum Bornsztain, Rabbi of Biala [father of the Avnei Nezer]. The letter was printed in his book Agudat Ezov p. 252 and in the book Nishmat Chaim, Orach Chaim p. 342. Apparently, this is an original manuscript of R. Ze'ev Nachum, sent to R. Chaim Berlin, Rabbi of Moscow [who lived in Biala during 1884-1889 after his second marriage to the daughter of R. Noach Shachor of Biala].
2 leaves, Size and condition vary. Open tears.