The Anglo-Portuguese Treaty of 1878 was an economic agreement between Portugal and the United Kingdom regarding their trade and a railway between their colonies in India.
Portugal wanted to end Portuguese India's trade isolation, in order to expand its economy.
This would be through a Customs Union with British India, and the construction of a railway line.
Portugal offered Britain a monopoly on Goan salt production in return.
The government of British India also did not obtain substantial benefit from the treaty.