A quote
because nothing sends a ship along so well as its upper canvas; that is where most of the speed is obtained. So when the breeze has stiffened and becomes stronger than is comfortable, they set their yards lower; for the wind has less force near the surface of the water. Accordingly, when they have made Capreae and the headland whence Tall Pallas watches on the stormy peak, all other vessels are bidden to be content with the mainsail, and the topsail stands out conspicuously on the “Alexandrian” mail-boats.
Seneca·Letter 77 — On Taking One’s Own Life (§2)·trans. Gummere