Link Parking for 1912...

http://www.costumes.org/history/acarter/bonton/1912bonton.htm

Although this is a couple of years off I think this book might prove valuable in aiding in construction methods.

http://www.bartoscollection.com/fpedwardianera.html

http://oldrags.tumblr.com/post/4684063274/evening-dress-1912-source-unknown

http://entertainment.webshots.com/photo/2572150170059564510kvrCrh

http://madameguillotine.org.uk/2011/03/18/titanic-fashion-1912/