Trading

There are countless trade routes crisscrossing the Dreamlands, but for a variety of reasons the major routes are by sea. They are anchored in four major trading ports: Dylath-Leen, Celephaïs, Pungar-Vees, and Rinar. Other key cities on trade routes include Shiroora Shan (controls the Night Ocean, and is the primary gateway between the central Dreamlands and the East), and Hazuth-Kleg (the primary gateway between the Twilight Sea the central Dreamlands lands to the south).
Trade is mentioned a number of times in canon, and those entries are included below along with my own listings of trade goods produced by various cities:

• black three-banked galleys that sail to Dylath-Leen with rubies from no clearly named shore (lunar mines), taking only gold and fat black men of Parg
  spun wool and cabbages of Ulthar
• the fragrant resin of Oriab’s inner groves (and perfume), and the delicate porcelain baked by the artists of Baharna, and the strange little figures carved from Ngranek’s ancient lava. For this they were paid in the wool of Ulthar and the iridescent textiles of Hatheg and the ivory that the black men carve across the river in Parg
• jade goblets that merchants brought from Ilarnek
• apples from Sinara and Jaren
• Kadath mentions the “silk of Oriab”
• Spider-silk from Moung (worth its weight in silver)
• Kadatheron: Cork (for Chong’s wine barrels)
• Aphorat (Cydathria): Copper, brass, and bronze, raw and worked
• Sona Nyl: silver
• Shiroora Shan & (to a lesser extent) Despina: Fine glass and crystal
• Beans eaten by armies. Major source Hazuth-Kleg, Eusapia; lesser amounts around Twilight Sea. Mostly shipped down River Oriathon to Beersheba, then by ship
• Ebnon: Rice, sugarcane, indigo, beans, coffee, millet, (Gondaran silk)
• Zeenar: Rice, millet, barley, wheat, cotton, beans, coffee, horses, (Gondaran silk)
• Karida: Porcelain, wheat, barley, cotton, horses
• Gondara: Green teas, spices, gems, paper, silk
• Mondath, Toldees and Arizim: Tobacco and thagweed