Here is a pattern that might help. It's a bit more of the natural look.http://www.folkwear.com/216.html
The same company has a Gibson blouse. http://www.folkwear.com/205.html
And an Edwardian Bridal Dress that is pigeon breast.http://www.folkwear.com/227.html
If all your intested in is the collar then it looks like a varient of a middy collar.