These documents are rather distinctive not only because they are dated in the 1780s but also the page design of a blue vines links them. The mill might have ordered blank books printed and bound and then glued in swatches as they produced them, each with a four or five digit number.
A few squares in the pockets are also quite distinctive, particularly the stripes. I found similar inventive stripes in these swatch books dated 1783 and 1784.
I wouldn't be surprised if the pockets were as early as the 1780s and I also wouldn't be surprised to find out the maker had access to a similar swatch book and ripped out a few samples.
isn't until printers figured out metal engraving techniques in the early 19th century that these fancy grounds became more graceful.
Thomas Smith and Son are listed as fustian manufacturers (linen/cotton combination fabrics) in Ellenbrook about ten miles west of Manchester.
"He spent a large part of each year between 1819 and 1827 in the United States, based primarily in Charleston, the main cotton exporting port, and occasionally in New York, buying cotton and extending the business which dealt largely in the long fibre cotton of the Carolina Sea Islands. Returning to England he left Joseph Smith & Bros. joining a new firm, Benjamin Smith & Sons, which had offices in Liverpool. He continued in the Lancashire cotton business, the 'pace making industry of the Industrial Revolution', until his retirement in 1850."
The initials might indicate rather that JHM was Jane Hewlett Mitchell (1769-1794) of Long Island which further dates them to before 1820.