Asiento present hordenat a payon les responsions dels pezos e mezures : delahun boch al altre de tots los presents bochs nnomenats los quals son cap e regiment de la mercadoria hordenat : [Mediterraneo e Europa] /

Diagrammatic map of weights and measures in use in 27 Mediterranean and European seaports.
Oriented with north to the right.
Each port city is represented by a vignette of a prominent local tower and the vignettes are connected by rhumb lines.
Manuscript: pen-and-ink (light brown) and watercolors.
LC Nautical charts on vellum, 4.
Available also through the Library of Congress Web site as a raster image.
Includes notes and an aerial view of the walled city of Siena in the upper margin (neck of sheet).