Sarah Pitt advertises in the Virginia Gazette in October of 1768 that she offers for sale "a great assortment of threads".  Some of the threads likely available were what we like to call "Tailor's" threads.  The 18/3 "Tailor's" Linen Thread -Heavy - Large Spool is a perfect size for cording of buttonholes, or any other area where a very stout thread is required.

• These 18/3 "Tailor's" Linen Thread -Heavy - Large Spools have 90 meters/295 feet per spool
• A 30% savings over our small 18/3 spools, great when you have multiple projects or don't like running out! 
• Available in Natural only.