This wedding information was sent out by Elizabeth Sladden (née Coleman) to announce the forthcoming marriage of her son, Julius, to Eugénie Mourilyan:
Mrs Sladden has the honour to share with you the marriage of Mr Julius Sladden, her son, with Miss Eugénie Narcisse Mourilyan. And ask you to attend the wedding which will take place on Saturday 15th December 1877 half past eleven precisely, at the British Embassy, 39 Faubourg, St Honoré, Paris.
The original of this invitation may be seen at the Worcestershire Archive & Archaeology Service, reference 705:1037/9520/8/i/151.