sentences:  Piperno's collection "Ḳol 'Ugab", Leghorn, 1846.He was an intimate friend of the poet Abraham Isaac Castello and of Moses Hayyim Luzzatto, who wrote a eulogy of him in a Hebrew poem after his graduation, and subsequently corresponded with him.When Calvo died Joseph ben David wrote an elegy, which is published in his "Yeḳara de-Shakbe", 1774.