1827

Explorer Allan Cunningham names the Darling Downs.

1840

Leslie brothers establish Toolburra; head station at Canning Downs.

1844

Campbell brothers secure leases from Leslies to establish the Glengallan run.

1852

Glengallan transferred to C.H.Marshall, managed with Robert Campbell.

1855

Marshall takes-in partner John Deuchar; Glengallan Merino Stud established.

1865

Marshall returns to England. Deuchar contracts to buy-out partnership.

1867

Deuchar embarks on building program including Glengallan house.

1870

Deuchar bankrupt. Marshall forecloses.

1873

Marshall forms new partnership - W.B.Slade establishes showpiece sheep and cattle station.

1895

First resumptions under Queensland Agricultural Lands Purchase Act.

1904

Gillespies purchase homestead bock. Slade-Marshall partnership dissolved.

1927

Alex Gillespie dies. Glengallan forfeited to bank. Atkinson family moves into Cedar Wing.

1931

Oswald Slade purchases Glengallan; Cockram family lives in Cedar Wing.

1946

Cedar Wing dismantled and rebuilt as farmhouse Tannymorel, later Upper Swanfels.

1956

Oswald Slade dies; property bequeathed to Church of England Slade School.

1960s

Glengalland furniture and fittings removed.

1972

Smith family purchases Glengallan Station.

1993

Smiths sell House to GHT for one-third market value with proviso the place be held in trust for people of Queensland.

2002

Centenary of Federation Fund enables Glengallan restoration project; Heritage Centre established.