Manuscript, Taryag Mitzvot, list of 613 commandments, by R. Yaakov Shimshon Shabtai Sinigaglia, author of Shabbat shel Mi. [Italy, 19th century].
Neat Italian square script, possibly handwritten by the author.
The title page states: "613 commandments listed by the author of Midbar Tzin". Midbar Tzin is an unpublished work of R. Yaakov Shimshon Shabtai Sinigaglia which he mentions in his printed books.
The title page is followed by the author's preface.
The work lists the 613 Torah commandments and seven rabbinic commandments, divided into categories: "Constant", "When the opportunity arises", "When our Temple will be built". In his preface, the author explains that he saw counts and hints for the various classifications of mitzvot in a gloss in the Shelah (p. 264b) quoting the Megillat Setarim, so he resolved to list the commandments here in categories accordingly.
To the best of our knowledge, this work is unpublished.
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 He authored many compositions, some of which are to date unpublished.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 shel 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 Several of his compositions remain unpublished, including the present work (two of his works was recently published by Machon Yerushalayim: Mateh Oz on Tractates Arachin and Zevachim, and Pisat Bar on Tractates Menachot and Bechorot).
The present work is mentioned 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).
[31] leaves (and several blank leaves). 16.5 cm. Fair condition. Stains, including dampstains and dark stains. Worming, affecting text. Original binding, damaged.

Author's Blessing for Whoever Publishes His Book
In the manuscript of his work Mateh Oz (published by Machon Yerushalayim), R. Yaakov Shimshon Shabtai Sinigaglia blesses whoever volunteers to print his 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…".