Plaque: Emma Cons - W1
Emma Cons, 1837 - 1912, philanthropist and founder of the Old Vic, lived and worked here.
Greater London Council
Cons was not herself wealthy so it seems odd to describe her as a philanthropist, and the plaque has her birth year wrong, according to the Oxford Dictionary of Biography.
Site: Emma Cons (1 memorial)
W1, Seymour Place, Walmer Castle, 136 Walmer House
The 1873 (listed) building was opened as the Walmer Castle Coffee Tavern, i.e. decidedly not a pub. Later it was known as "Church Army Coffee Tavern & Lodging Home", or "Temperance Hotel". In the late 1870s and 1880s this was run by Emma Cons and she held meetings here organising her various campaigns.
Ornamental Passions has a good photo of the castle relief on the front corner, on the band between 1st and 2nd floors.