OK - this one's a little different. I took my family to the Art Institute of Chicago in 2015. There is a section in the museum that has about 50 of these miniature doll house rooms - elaborately and perfectly decorated. It was an amazing exhibit. I took a lot of pictures. But they also had the story of Mrs. Narcissa Niblack Thorne and photos of all the rooms in this awesome book written and compiled by Fannia Weingartner. And yeah - you can buy this book used on Amazon for a penny.
This site also shows a comparison of the rooms with the postcards they were inspired by.