Several years ago i bought directions for soldiers' socks from Susan Stone on eBay. She took directions printed in the 1860s in the Charleston (SC) Mercury and added notes for modern clarity. I still have the directions and would have guided you to her website, but checking the site out just now told me she's temporarily shut down!
I do know that her directions stated modern size 00 needles would work for most knitters, with larger or smaller needles recommended for those who knit more tightly or more loosely than the gauge recommended for the socks.
After several botched socks, I finally produced a pair according to her directions. They are very fine knit and do not go quickly.
Here's her website, although as I said, right now, or at that site, you can't buy the directions.
http://escproductions.bizland.com/st...uff/index.html
Possibly I wouldn't be breaking copyright law by emailing you portions of the publication.....