The Oxford English Dictionary (OED) notes that the hogshead was first standardized by an act of Parliament in 1423, though the standards continued to vary by locality and content.
By the 18th century carts had replaced many of the packhorses and were transporting many goods including, oil, hardware good, barrels of tar, hogsheads of treacle, glue from Manchester, lead and small grinding stones.
He has also produced artwork for other games such as The Wheel of Time Roleplaying Game (Wizards of the Coast) and Warhammer Fantasy Roleplay (Hogshead Publishing and Black Industries).