Hi, Susan. Welcome to the Old House Web!
There's some value in looking over the reprints of Sears Roebuck and Montgomery Ward catalogs. They're black and white, but a few wallpaper patterns are pictured, and you can get a glimmer or two from the list of paint colors. As I once read, these firms offered products that sold and sold well, so their catalogs are a great key to average taste.
The book Victorian Interior Decoration
by Roger Moss and Gail Caskey Winkler answered a lot of my questions.
Here are a few web sites I love to pore over.
History of dollhouses and dollhouse furniture, beginning with the 1890s. A wealth of detail. (Some furniture is shown in people's homemade dioramas, with walls adorned with Con-Tact paper "wallpaper," so don't take that as design pointers.)http://www.mckendry.net/DOLLHOUSES/1890s.htmhttp://www.mckendry.net/GALLERY_OF_IMAG ... AGES_1.htm
Wallpaper printing firms. Browse old patterns, each reproduced from a sample found in a historic American home, classified by date.http://wolffhousewallpapers.com/id3.htmhttp://www.victorianwallpaper.com/products.htmhttp://www.carterandco.com/http://www.aestheticinteriors.com/sc/store.phphttp://www.adelphipaperhangings.com/but ... hintz.html
The Thaddeus W. Bayless House
Built between July 1863 and January 1865, major add/reno between 1890 and 1902
Style = Mutt