I love the interesting side pose by this attractive young Chicago woman who is identified on the back as Millie Loudwick. She looks quite lovely with a somewhat distant look on her face. She must be thinking about taking a walk with her beau wearing her flowered, white hat which is on the sofa and carrying her parasol. I was excited to see her name on the back, but alas was unable to find any trace of her in Ancestry.com.
I've decided that this was most likely taken in the late 1860's due to a number of factors including thickness of the card paper, measurements of the CDV, the two stripes of the border and it most likely had square corners which I believe were cut to put in an album at one time.
The photographer is listed as Shaw's Mammoth Photograph Rooms located at 186 South Clark St. in Chicago. A quick search did not turn up any results, but I like the slogan on the bottom of the card, "Pictures Taken In Cloudy Weather at these Photograph Rooms, Superior to those taken elsewhere in town on a fair day."