The document discusses mark making techniques used in historical drawings. It analyzes 15 drawings from well-known artists such as Bellini, Carpaccio, and Greuze. The drawings demonstrate a variety of mark making including: fine lines to show texture and shape, hatching for tone and shadows, curved lines to depict form, and washes blended with lines. Studying these techniques provides ideas for the author's own drawing practice, such as using fine lines to refine figures and experimenting with different mark making styles.