This is an 18th century mezzotint portrait of Elizabeth, Countess of Northumberland, Baroness Percy by Richard Houston after a painting by Joshua Reynolds, published in London by Robert Sayer in 1763. It is a rare, full length portrait of Elizabeth, who was known as Lady Betty. Lady Betty stands, facing to the right, holding her coronet, and wearing her peeress’s ermine and velvet robes over a brocade dress. In the background are a column, a billowing drape, and the grounds of Alnwick Castle, Northumberland, her ancestral home. This striking engraved mezzotint portrait is printed on laid, chain-linked paper. The sheet measures 17.5" high and 11.5" wide. The sheet is adhered to an archival backing sheet along the top only. There is some discoloration and spotting in the margins and in the lower inscription area, but these do not effect the image, which is in very good condition. This engraving is held by several museums and institutions including: The British Museum, The National Trust, The National Portrait Gallery, The Center for British Art at Yale, The Harvard Art Museum, The Victoria and Albert Museum London, and The National Galleries of Scotland.