William Graham set up a trading company in Glasgow in 1784, and over the following decade developed as a textile and dry goods exporting enterprise.

[1] In 1820, his son John accepted twenty-seven pipes of Portuguese port wine in place of a debt.

The new venture proved successful and, in the 1880s, trade was sufficient that William and John spun out W. & J. Graham to serve the new market.

[6] Quinta dos Malvedos was repurchased in 1982 in a poor state, but was revived and has become a key part of the Graham estate.

[7] More recently, the company has released a range of ports designed for non-traditional drinkers under the Blend brand.