Engraved frontispiece coat of arms on verso facing t.p. of Humbelot Seal, v. 1-3 Includes index in each volume Includes a final leaf, v. 1, reading 'Registro' which includes signatures and imprint information The 3 vols. were published together in 1581 with title: Delle lettere di principi .. Signatures: v. 1: a2*A-3L3M²(K2 missigned H2); v. 2: ab²A-3R3S(3Q1 missigned 3R); v. 3: *bA-4C Dedication of v. 1 signed Jeronomi Ruscelli; dedication of v. 2 signed Franceso Ziletti; dedicaton of v. 3 signed Giordano Ziletti John Adams Library copy has bookplate: John Adams Library, in the Custody of the Boston Public Library BM STC Italian, 1465-1600 Also available on microfiche (1581 edition) John Adams Library copy transferred from the supervisors of the Temple and School Fund. Quincy, Mass., 1894