Since the GRO doesn't provide much details, I'm trying to find out more on Henry Stevenson (? - ?) his spouse Julie Allart (1841-1880) and their children :
Mary Stevenson : 1874, London - 1917 Paris
Emily Stevenson : 1876 Marden, Kent - 1955 Paris
Henry Stevenson : 1878 Marden, Kent - ?, Canada.
I hope you can help me out !