Union Steamship Co
of Southampton, for many years the only Mail Service to the Cape of Good Hope and South Africa.
c.1880 At some point the name of Union Steam Collier Co was changed to Union Steamship Co
1886 Several ships had their engines converted from compound to triple expansion type, including RMS Spartan and RMS Athenian of the Ocean Mail Service, and SS Anglian and SS African of the Intercolonial Service.
NB This is not the same as Union Steamship Company of New Zealand