From Merthyr Tydfil with Love: The Song Bore Witness

John Rees recounts the story of his conversion to Mormonism through a song. He said that he and his father, William Rees, were walking home from work one evening and happened to pass a small church in which some Mormon preachers were holding a meeting. The preachers had just commenced to sing and so they paused to listen. Something about the song compelled them to listen, then they continued on their way home. The song bore witness to them that these preachers were indeed men of God. The song they sang was “The Resurrection Day”. John claimed it was the first time it was sung in Wales. William joined the church in 1850 and John later joined in Liverpool being baptized by Orson Pratt in 1852. (a seemingly small event that has had historic reverberations for many descendants).

I have searched and searched for the song and the only one I have come up with that was contemporary for the time is this one:

The Day of Resurrection

Text: John of Damascus; trans. by John Mason Neale
Music: Henry T. Smart, 1813-1879
Tune: LANCASHIRE, Meter: 76.76 D

1. The day of resurrection!
 Earth, tell it out abroad;
 the passover of gladness,
 the passover of God.
 From death to life eternal,
 from earth unto the sky,
 our Christ hath brought us over,
 with hymns of victory.

2. Our hearts be pure from evil,
 that we may see aright
 the Lord in rays eternal
 of resurrection light;
 and listening to his accents,
 may hear, so calm and plain,
 his own "All hail!" and, hearing,
 may raise the victor strain.

3. Now let the heavens be joyful!
 Let earth the song begin!
 Let the round world keep triumph,
 and all that is therein!
 Let all things seen and unseen
 their notes in gladness blend,
 for Christ the Lord hath risen,
 our joy that hath no end.