C. Lewis Hind,
The Drawings of Leonardo da Vinci
“ One authentic portrait of Leonardo by his own hand exists—the red chalk drawing in the library at Turin. Dating from the last years of his life, it shows the face of a seer, moulded by incessant thought into firm, strongly marked lines. The eyes lurk deep beneath shaggy brows, the hair and beard are long and straggling—it is the face of a man who has peered into hidden things and who has pondered deeply over what he discerned. ”
