I recall loading what I was told were very high grade cotton bales in Karachi, Pakistan in the mid 1960's on break bulk ships. They were loaded into the lower hold of the vessel which must have been about 30 feet high while the tween decks were only about 10 to 15 feet high. The Bedouin longshoremen would build a bridge of cotton bales to manually heave the bales up to the height of the lower hold. There would be about 4 to 6 men around a bale manually heaving the bales up to the highest part of the hold. They would have chants, much like what must have been used by seamen on sailing ships, to coordinate their efforts to heave the bales up to the highest points. It was fascinating to watch.