Stuart, The cuff braid is without doubt the proper one for an Other Rank of Light Dragoon, 1855-1861. Other things that make me assume that he is an OR are the yellow colouring of the braid, where an officer would have gold, the peakless forage cap and the somewhat crudeness of the picture. As for the unit, the 3rd Light Dragoon indeed seems correct. Alternatively, it could be the Montreal Volunteer Cavalry, who wore an identical uniform (Ref : "The Canadian Campaign, 1860-70", Osprey Publishing). It depends on where this picture was found. Michael, The Crimea Medals were issued sometime in 1856 (exact date escapes me, I must check the Spink book), at a time when the troop wore the double-breasted Pat 1855 tunic/doublet (see : http://www.btinternet.com/~james.mckay/crimea14.htm and http://www.btinternet.com/~james.mckay/crimea17.htm). So, in my opinion, the picture cannot have been taken prior the issue of the medal. The single breasted Pat 1856 tunic/doublet was worn until the late 1860s-early 1870s, when replaced by another pattern. Eric