The trade, particularly fishing for herring, continued to act as the town's main identity until the 20th century.
Despite the financial crisis, trade between the two countries has continued to grow and hit $5.1bn in the first nine months of 2009.
As trade in Blyth continued to grow, so did the population.
Retail trade continued to add jobs in December, with a gain of 28,000.
"The general trade of the country continues active and the prospects for the coming year are considered brilliant."
The trade continued to run well for a while.
Though the Empire saw difficult times in the 7th century, trade continued.
Profitable trade also continued to grow between the two sides.
While the canal operated, trade continued on a significant scale.
North Korea's foreign trade continued to deteriorate in the 1990s.