Written by Benjamin R. Hanby, 1866. Tune is called Lowliness or Who is He. See here for scores and more info on the composer
https://hymnary.org/text/who_is_he_in_yonder_stall
The refrain answers the questions which each verse asks. It talks about several events in the life of the Lord Jesus, starting from birth through his death and resurrection reigning in heaven.
As is common with songs of this time, it can be described as a 'jolly ditty'. It is quite catchy and simple tune.
The piece builds up, starting with the Swell's quietest stops, before hearing the Solo flutes, then continuing building up through the Swell, Great and ending with Full organ.
Hope you enjoy.
John