They moved to their third home, The Athletic Grounds, on 6 September 1890. This was their first purpose-built ground, with a grandstand that seated 600 people and an overall capacity of between 10,000 and 15,000. The club was forced to move on again though, this time by the Millwall Dock Company who wanted to use it as a timberyard. They relocated in 1901 to a location near their second home, which became known as North Greenwich. They remained an east London club for a further nine years, with the last game played on the Isle of Dogs on 8 October 1910 against Portsmouth, which Millwall won 3–1.