Gibb, I googled "cotton screw cargo" and came up with a Google Book named "Handbook of the Bombay Presidency" By John Murray (Firm), Edward B. Eastwick. On page 128 there is a description of various types of cotton screws used in India in the late 18th and early 19th centuries to produce bales. Unfortunately there is no mention of screwing the bales into a ship's hold. But there is reference to a cotton screw which after 1806 used a capstan powered by 240 men! Picture that. On the previous page of this book is an interesting section on British ships built in India of teak, and the superior qualities of that wood over English oak. Jerry
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