From Colonial Williamsburg's excellent online Emuseum
Mayo Island powder horn
May 20, 1774
Maker: George Deval
Origin: America, Virginia, Richmond area
OL: 14" OW: 3 1/8"
Cow horn, wood, ink & brass
Acc. No. 2011-4
Engraved powder horn with faceted & carved spout, embellished with a reinforcing ring set slightly back from the tip. The whole of the horn goes from a dark cream color to a darker greenish color as it nears the spout. Its rounded soft wood base plug is retained by 5 cast brass tacks (one of which is missing) and has a rectangular patched repair, with a tiny brass wire loop, is inlet into the center of the plug. Engraving shallowly executed, a problem compounded by subsequent wear.
Inscription(s): "George Deval His Powder Horn Come From Isld. Mayo May 20, 1774"
By the French and Indian War, engraved powder horns were extremely popular in the American Colonies, and were carried hunting and during military duty alike.
This horn was created either by or for a George Deval of Mayo Island in the spring of 1774. Since the only locatable Mayo Island is in the James River at Richmond, this piece is an extremely rare example of a pre-Revolutionary War Virginia powder horn.
Engraved on the horn is a scene of large masted ships and manned rowing craft filling the waterway around a hilly town, likely representing Richmond. Other decorative engravings include geometric designs, trees and a bird. In a band spanning the lower portion of the horn is the inscription "George Deval His Powder Horn Come From Isld. Mayo May 20, 1774."