Wet Plate Wednesday

There is so much to see in this 1860's ambrotype from the Timely Tresses collection: two well dressed women, a spiffy man, and even a dog.  The bonnets in this image are stylistically very different.  The woman on the right shows a high brim with narrow sides in the height of popularity in 1863.   In contrast, the woman on the left has a rounder earlier bonnet appropriate to the very early 60s or even late 50s.  Could this be a younger sister?  The fashionable high brimmed bonnet sports two different colored ties, a trend seen in fashion plates, but not often visible on extant bonnets or in photographs.