Leaf (two written pages) in the handwriting of R. Pinchas HaLevi Horowitz, author of the Hafla'ah, novellae on Tractate Nidah.
The leaf contains novellae on Tractate Nidah, from page 5a to page 6b. These novellae have not been printed.
R. Pinchas HaLevi Ish Horowitz, author of the Hafla'ah (1731-1805), close disciple of R. Dov Ber the Magid of Mezeritch [studied under his tutelage together with his brother R. Shmelke of Nikolsburg]. For more than 30 years, he served as Rabbi of Frankfurt am Main, the hub of Torah study in Germany at that time. The Chatam Sofer was among his disciples. He authored important books, including HaMikneh on Tractate Kiddushin, Ketubah on Tractate Ketubot and Hafla'ah on several tractates and on the Shulchan Aruch, giving him his cognomen "Ba'al HaHafla'a". 
[1] leaf (2 written pages), 19 cm. Fair condition. Stains and creases, wear and tears to margins.
Enclosed is an expert's report identifying the handwriting as that of the Ba'al Hafla'ah.