Peri Megadim.

Super-commentary to the Shulchan Aruch-Yoreh De’ah Simanim 1-122, here in two parts: Mishbetzoth Zahav on the Taz [Turei Zahav] and Sifthei Da’ath on the Shach [Sifthei Kohen]. Although R. Teomim’s work on Orach Chaim was ultimately far more popular, in part thanks to its broad usage by the Mishnah Berurah, this commentary was printed first perhaps implying greater pride on the part of its author. The title page notes that the work was supported by the Berlin Court Jew, Daniel Itzig.