a blenheim spaniel

thanks wikimedia commons (PD:100)

That's all the title says: "A Blenheim Spaniel," by British artist William Webb, circa 1825.  I thought I knew about a great many sorts of spaniel, but that threw me.  Here's the answer from the AKC: "Blenheim" is a color variety of the King Charles spaniel - chestnut and white. The other coat colors are Tricolor (black, white, and tan), Ruby (solid red) and Black and Tan.  So why does the admittedly snappy combo of chestnut/white get a special name?  Because it was the favorite of the 19th c. Duke of Marlborough, who lived in Blenheim Palace. (Wikipedia to the rescue.)