Cello,Piano - Digital Download SKU: A0.1071839 Composed by Mary Taylor. Christian,Gospel,Praise & Worship,Sacred,Spiritual. Accompaniment. Duration 118. Mary A #4312221. Published by Mary A (A0.1071839). This song is called I Will Sing Of His Mercies. The song you hear has piano and the cello added to the audio file. The music is beautiful to listen to. I wrote the song arrangement for piano and I have the lead sheet arrangement as well. I hope who ever listens to the song will be blessed.