Giorgio Vasari, Lives of the Most Excellent Painters… (1850)
“ The face of Cain is altogether the contrary, it is indeed the countenance of a truly bad man. And now had Sogliani continued the work with spirit and promptitude, the Superintendent of works to the Cathedral, from whom he had received the commission, and who was pleased with his manner of painting, as well as with the excellence of his character, would doubtless have suffered him to complete all the works required for the cathedral. But Giovan Antonio relaxed in his attention, and therefore did not at that time execute more than one picture, in addition to those above described. ”
