Suggestion: You need to put in a location - any information that you may have as to:
COUNTRY - Province/County/State - City/Town for the birth/marriage/death of this couple.
Can't tell if you are looking for someone in South Africa/ or Great Britian! etc.
If either has a WikiTree ID, you should include that too.
When logged in you can click - edit - to the right of your question and add any related information.