market.... They also purchased cloth woven by the Sankamphaeng villagers for sale in the city. They made loans to the villagers too.... Before long they became steadily richer. (Prani 1980, 191-3)
As one part of their caravan business, the Sae Khu family imported plain silk from Burma, dyed it, and reexported it back to Burma as sarongs. This business underlay the family's next stage of growth.