.

marks on page ... ink stains ... thumb prints ...
water rings ... blueprints

In the Codex Leicester (1508), Leonardo da Vinci
metaphorically describing the earth as a body
refers to water as the blood. He explores
the dynamics of water: its flow ... interruption
Page, image, text by Christy Sheffield Sanford; original photo by Margaret Tolbert, Lake Applet by David Griffiths, 1997.