From the recording Jameson Sisters - Neat!
This melody was supposedly composed by Ruaidhrí Dall Ó Catháin (Rory Dall O'Cahan) in the 1600's. The earliest printed version of the melody is Aislean Oighear in Bunting's 1796 "A General Collection of Ancient Irish Music"
Frederick Weatherly wrote the lyrics and published them to a different melody in 1910. The song was republished in 1913 with this melody and became a hit in England, Ireland and the U.S.
Lyrics
Oh, Danny Boy, the pipes, the pipes are calling
From glen to glen and down the mountainside
The summer's gone and all the roses fallen
T'is you, t'is you must go and I must bide
But come ye back when summer's in the meadow
Or when the valley's hushed and white with snow
T'is I'll be here in sunshine or in shadow
Oh, Danny Boy, Oh, Danny Boy, I love you so.
But if you come and all the flowers are dyin'
If I am dead as dead I well may be
You'll come and find the place where I am lyin'
And kneel and say an Ave there for me.
And I shall hear though soft you tread above me
And all my grave, shall warmer sweeter be
For you will bend and tell me that you love me
And I shall sleep in peace until you come to me.