Dear Andrew,
The following are the names and years of the marriages I located when in T'dad over a month ago. I have no other details of these individuals. You can write the Registrar requesting the marriage certificates for these individuals if they are the people you seek.

Victoria Alexander Coker to Dudley St Clair Jones in 1913.
Alexandrine Henry Coker to Frederick Pierre Sylvester in 1914.
Adriana Roseline Coker to Jarvis Bennicourt in 1919.

Hope that these will be helpful to you. I kept the names just in case they should show up in my family tree. So take care now and happy hunting,
Joanne