SPAIN. CARLOS III (1716-1788). L.S. "Yo El Rey", Aranjuez April 28, 1766, to the Bishop of Salamanca; 1page in-fol. address (trace of seal, small missing corner); in Spanish. He thanks him for his letter; he does not doubt his religious zeal, and his love for His Royal Person, which direct his effective actions to obtain Divine Piety...