According to the digital music sheet published at Musicnotes.com by Alfred Publishing Co., Inc., the song was written in a key of E minor.

According to the digital music sheet published at Musicnotes.com by Universal Music Publishing Group, it is written in a key of F minor.

According to the digital music sheet published at Musicnotes.com by Faber Music, the song is written in a key of B minor.

According to the digital music sheet published at musicnotes.com, the song is written in the key of E major and is set in simple time.

According to the digital music sheet published at musicnotes.com, the song is written in the key of B minor.

According to the digital music sheet published at Musicnotes.com by BMG Rights Management, the song is written in a key of G major.

The next day the colours appeared on the cover of the music sheet published by Boyle.

According to the digital music sheet published at Musicnotes.com by EMI Music Publishing, it is written in the key of E major.

According to the digital music sheet published at Musicnotes.com by Alfred Publishing Company, Inc, it is written in the key of G minor.

According to the digital music sheet published at musicnotes.com, the song is written in the key of D major, with a beat of 86 beats per minute.