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 consider him a humbug, a man of small capacity, very obstinate, not at all chivalrous, exceedingly conceited, and totally selfish." - - Lafayette McLaws about James Longstreet.