Manuscript, Ayin Roah, handwritten by the author R. Yaakov Shimshon Shabtai Sinigaglia, author of Shabbat shel Mi. [Italy, 19th century].
Unpublished composition, one of the author's many works. It comprises selected comments and novellae on various topics, bibliographic data, summaries of topics from various books, and more.
The front endpaper states: "Kuntress Ayin Roah, named Leshon Limudim in my book Abir Yaakov leaf 96…". Indeed, the author mentions his work Leshon Limudim there in Abir Yaakov. The author presumably later changed the name of this work from Leshon Limudim to Ayin Roah.
In several places in the manuscript, the author mentions his other works, noting that certain passages were copied to them (most of these passages are crossed out) – Leket Shichchah on Berachot, Midbar Tzin, Leket Shichchah on Kiddushin, Leket Shichchah on Pesachim, Matat Elohim, Meged Shamayim, and more.
R. Yaakov Shimshon Shabtai Sinigaglia (1740s – ca. 1840), leading Italian Torah scholar and particularly prolific author. He authored many compositions, some of which are to date unpublished. He is renowned for his work Shabbat shel Mi on Tractate Shabbat, which was published in several editions and is considered a classic book for the study of this tractate. He was held in high regard by the rabbis of his generation. The Chida, who entertained close ties with him, attested in a letter to him that he would bless him every day (Igrot Chida, Rosenberg edition, section 7). Likewise, he maintained ties and exchanged correspondence with R. David Sinzheim, who praises him profusely in his approbations to his books Matat Elohim and Nezir Shimshon.
R. Yaakov Shimshon Shabtai refused to undertake a rabbinic position, and applied himself exclusively to Torah study and the writing of his works. He was a particularly prolific author, and composed many works. Over ten of his works were published, including Shabbat she Mi on Tractate Shabbat; Abir Yaakov – on Tractate Keritot, Nezir Shimshon – on Mishnayot, Matat Elohim (with Leket Shichchah) – on Talmudic tractates, and more. Several of his compositions remain unpublished, including the present work (one of his works was recently published by Machon Yerushalayim: Mateh Oz on Tractates Arachinand Zevachim. His work Pisat Bar on Tractates Menachot and Bechorot is soon to be published – see below).
[2], 95 leaves. Approx. 25-27 cm. Tall, narrow format. Fair-good condition. Stains. Worming, affecting text on some leaves. Marginal tears. Several detached leaves. Inscriptions. Original card binding, with strings for tying; damage and worming to binding.

Author's Blessing for Whoever Publishes His Book
In the manuscript of his work Mateh Oz (recently published by Machon Yerushalayim), R. Yaakov Shimshon Shabtai Sinigaglia blesses whoever volunteers to print the book: "…the kind person who undertakes to publish my work, will be blessed by G-d… he will have an arm with might, years of life will be added to him, and evergrowing goodness, he will merit to see the consolation with the coming of Mashiach…".
This work, Ayin Roah, was described by R. Chaim Rosenberg Rabbi of Ancona, in a list of R. Yaakov Shimshon Shabtai Sinigaglia's manuscript works (Igrot DeRav Chaim Yosef David Azulai, Vác 1927, pp. 11-12, note 3), where he writes: "Ayin Roah is the same as Leshon Limudim… it comprises important points, especially regarding bibliography, biography and Talmud methodology, and it is a great mitzvah to publish it".