A VERY RARE two-volume work by the biblical scholar and archaeologist born in Santa Maria Capua Vetere, containing epistles, orations, dedications, inscriptions, poems, and diatribes. The first volume, dated 1771, was published by Gaetano Migliore weeks before the author's death; the second, dated 1775, was also edited by Gaetano Migliore. Many years later, in 1824, and again in 1830, a third and fourth volume were also published. The first volume opens with the first biography of Mazzocchi, written by Francesco Serao during Mazzocchi's lifetime, around 1750, first published in 1767 and reproduced here. The volume also includes: two funeral orations, 38 letters attesting to Mazzocchi's relationships with Pope Benedict XIII, Scipione Maffei, Pope Benedict XIV, Giacomo Ruffo, and others, and more than 150 inscriptions of a religious and other nature. The second volume includes the dissertation "The Origin of the Tyrrhenians," consisting of a preface and eight diatribes (the ninth and tenth diatribes were published, based on Mazzocchi's manuscripts, in the third volume edited by Vincenzo Cala' in 1824). According to Mazzocchi, the Etruscans have an Eastern origin: but what is particularly interesting is the philological analysis of the terms widespread in the Po Valley and, proceeding southward, in the areas of central-southern Italy occupied by the Etruscans up to lower Campania. The most significant terms that would reveal an Eastern origin are, in his opinion, the two Latin names of the Po River, namely Padus and Eridanus. The first diatribe deals with the seven seas of Transpadane Etruria. The second diatribe contains the explanation of the poleonyms Mantua, Felsina and Perugia. The third contains the catalogue of the places of the Etruria circumpadana. The fourth reviews the names of Umbria and Piceno derived from Eastern languages. The fifth considers the Etruscan names of Campania. The sixth contains the catalogue raisonné of the names of the places of Etruria. The seventh explains the etymology of the names Volterra, Populonia and Elba. The eighth examines the names of Etruscan kings, gods and characters.