Bought by Shaw. That isn't a dealer's name I recognise, but doesn't exclude the possibility..
M&R gives the chronologically closest person with this name as W S Shaw in 1858, but that sale was Books, Pictures, Engravings etc with one Napoleon medal noted and 56 years later. He is noted as the late keeper of the Sasines Register for Fifeshire, so being in public office there might be a possibility of confirming or condemning him as a possibility. The next Shaw listed wasn't until 1891.