instead of building great roads like the Romans, the Egyptians made use f the Nile river. to travel north, they let sails down and let the current carry them. to travel south, they raised sails and followed the trade winds.
In the past, sails were made out of a material called 'sailcloth' or 'canvas' which was originally made from hemp/flax fibers (linen). After the discovery of cotton this too was used as the source of fiber. In modern times, sails are rarely made from natural fibers and most sails are now made from synthetic fibers including nylon, polyester, aramids and carbon fibers. These sails are stronger and will not let the wind though. (In the past sail canvas had to be sluiced down to make it impervious to the wind - this made the sails and rigging heavy).
pinckney treaty
That would be a porthole, mate.
A grinder is a person whose job on a boat is to use the winches to pull in, let out, haul up or bring down sails. It is the most physically demanding job on a yacht.
A song
It means to open valves to let sea water fill the ship, then to leave the ship to sink. In wartime, often done rather than let the enemy have the ship.
Assuming it is an magneto phone. They are rare but heavy to ship.
The opera was a bit of a let down this evening.I love to let down my hair.
I think it is a bugle... either that or a cornet :) Sorry I can't let you know forsure, but I guarantee you can easily find the answer somewhere else.
You need to let them down nicely.
Let It Down was created in 1970.