Lastage
Bouvier's Law Dictionary and Concise Encyclopedia · John Bouvier; revised by Francis Rawle · 1914
Bouvier's Law Dictionary and Concise Encyclopedia
A custom anciently exacted In some fairs and markets to carry things where one will; also a custom paid for goods sold by the last (a certain weight or measure); the ballast of a ship.
Cowell.
Stowage room for goods in a vessel. Young, Naut. Diet.