Marriage, Presbyterian Church, Port Elizabeth, 1st March 1890:
John Thomas McKeown, full age, bachelor, musician, residence Uitenhage, after banns
Flora Jamieson McIntosh, spinster, residence Port Elizabeth
Port Elizabeth Directories:
1899: McKeown, J T, painter, St Paul's Hill
1901, 1902, 1903, 1904: McKeown, J, T., Richmond Hill
1905: McKeown, Mrs T.J., Richmond Hill [assume this should be J.T., no later listings for her]
Flora Jamieson McIntosh was born 29 February 1872 in Port Elizabeth, baptised 22 April 1872 in the Presbyterian Church, Port Elizabeth. Parents John McIntosh & Jane Hill Scott.
John McIntosh (Scotland 1835 - PE 17 Oct 1912) was in the Royal Navy, went to Kimberley, then PE. Among first members of Prince Alfred's Volunteer Guard - guard of honour to Prince when he visited PE.
Let me know when you have the date of his death - even though he died in the Transvaal, there may be an obituary in the PE newspapers....