[3] The pipe organ is a two-manual instrument built by Conacher and Co., one of only two in Scotland (the other is in St Mary's Cathedral, Aberdeen).

According to some accounts, Grant had only provided the harmonisation and that it was Irvine who wrote the melody, although this claim has been disputed by some scholars.

[6][7][8] A set of four etched glass panels inside the church commemorate Jessie Seymour Irvine as the composer.

The panels were installed in 2002 in memory of a previous minister, Rev James E Lyall (d.2002) and are illustrated with imagery of Jesus as the Good Shepherd and with musical notation from the first line of the hymn tune.

[3][9] Both Jessie and her father Alexander are buried in the family grave in the churchyard of St Machar's Cathedral in Aberdeen.