The first organ in Greyfriars was a harmonium installed against the west wall of Old Greyfriars in 1863, during the ministry of Robert Lee. This was the first successful attempt to introduce an organ in a Church of Scotland building. The harmonium was replaced in 1865 with a two-manual pipe organ by D. & T. Hamilton of Edinburgh. This was rebuilt and enlarged to three manuals in 1883 by Brindley & Foster of Sheffield. In 1932, after the union of Old and New Greyfriars, the organ was donated to St Columba's Church, Blackhall.