Dear Lu and Ladyhawk
Many thanks, and sorry for being so vague (new to this).
Walter Davies b. 1856 Shrewsbury, Shropshire, England - draper
1871 census has him still single, still living in Shrewsbury
1881 m. Annie Elizabeth Dodd in Dunedin
1893 died NZ
So he migrated (a dirty word nowadays - but these boards and history show it is what makes the world go round!) some time between 1871 and 1881.
So Ladyhawk's suggestion (arr. Australia 1875, aged around 20) would fit.
Many thanks
Richard