"although it be customary to part the hair in the centre, the division should be made on one side if it grow low on the forehead and beautifully high on the temples" From Godey's Magazine 1861

 

 

I love this picture and I find her hair most interesting.  Here is a link to a page were more research was done on parts- http://www.jessicadeandesign.blogspot.com/2013/06/curls-and-parts.html