A few small sections remained undeveloped at the time. In 1885 an unbuilt section of Queen Street (an open garden until that time), north of St Andrew Square, provided the site for the Scottish National Portrait Gallery. To the north-west, north of Charlotte Square, the land was part of the Earl of Moray's estate and a long-running boundary dispute with the Moray Estate. caused delay in development. A section of Glenfinlas Street at the north-west corner of Charlotte Square was not completed until 1990 while the western end of Queen Street, north of Charlotte Square, has never been developed.