This paired image, one colorized, is from Paul Frecker. I lightened the images to bring out details.
Duchess Augusta of Cambridge appears to be wearing a lace-edged shawl or a paletot in this and the next photo.
Keywords: 1860, Silvy, Augusta Wilhelmina Louisa, Augusta of Cambridge, Augusta of Hesse-Kassel, Princess, Duchess, Hesse-Kassel family, Hanover family, straight coiffure, bonnet, veil, lace, bows, high neckline, shawl, long sleeves, vee waistline, crinoline, ruching