The Londonderry Air

The Londonderry Air is an air that originated in County Londonderry, Northern Ireland. It is popular among the Irish diaspora and is well known throughout the world. The tune is played as the victory anthem of Northern Ireland at the Commonwealth Games. The song "Danny Boy" uses the tune, with a set of lyrics written in the early 20th century.

The title of the air came from the name of County Londonderry, and was collected by Jane Ross of Limavady in the county.

Ross submitted the tune to music collector George Petrie, and it was then published by the Society for the Preservation and Publication of the Melodies of Ireland in the 1855 book The Ancient Music of Ireland, which Petrie edited. The tune was listed as an anonymous air, with a note attributing its collection to Jane Ross of Limavady.

For the following beautiful air I have to express my very grateful acknowledgement to Miss J. Ross, of New Town, Limavady, in the County of Londonderry—a lady who has made a large collection of the popular unpublished melodies of the county, which she has very kindly placed at my disposal, and which has added very considerably to the stock of tunes which I had previously acquired from that still very Irish county. I say still very Irish, for though it has been planted for more than two centuries by English and Scottish settlers, the old Irish race still forms the great majority of its peasant inhabitants; and there are few, if any counties in which, with less foreign admixture, the ancient melodies of the country have been so extensively preserved. The name of the tune unfortunately was not ascertained by Miss Ross, who sent it to me with the simple remark that it was 'very old', in the correctness of which statement I have no hesitation in expressing my perfect concurrence.

This led to the descriptive title "Londonderry Air" being used for the piece.

The origin of the tune was for a long time somewhat mysterious, as no other collector of folk tunes encountered it, and all known examples are descended from Ross's submission to Petrie's collection. In a 1934 article, Anne Geddes Gilchrist suggested that the performer Ross heard played the song with extreme rubato, causing Ross to mistake the time signature of the piece for common time (4/4) rather than 3/4. Gilchrist asserted that adjusting the rhythm of the piece as she proposed produced a tune more typical of Irish folk music.