This is the best explanation I've seen from any period or antebellum manual about facing and doubling : http://books.google.com/books?id=Jv2...page&q&f=false It's from Infantry Tactics for Schools (1863). Don't let the title fool you. There's some great stuff in here. The text has an accompanying illustration for the first position after the company faces to the right in twos as indicated in all the schools of the soldier, but reenactors just don't seem to notice. It includes the sidestep to the right by the former rear rank and then the doubling.
This little gem also has the best method I've seen for how to post corporals after the company is formed by height.
- Silas Tackitt
"I take [this hobby] seriously just as any golfer, hunter, or fisherman would take their hobby seriously. You whine that "hard kewls" are what is wrong with this hobby, but I digress. In my opinion, the major defects in our little world consist primarily of the clowns and jackasses who don't take it seriously." - Mike Phineas, 2 August 2013.