Gaslight of the Day, No.4 [India House] (and yes, I know it's electric; and possibly was originally; but still)
Gaslight of the Day, No.16 [Royal Courts of Justice, Carey Street] (a real charmer; check out the additional of those iron arches for faux gothic window effect)
Gaslight of the Day, No.17 [Eagle, Shepherdess Walk] (possibly electric originally; this pub built c.1900, after the closure/demolition of the pleasure gardens, which had been taken over by Salvation Army in 1880s)
Gaslight of the Day, No.22 [Burlington Gardens] (surely one of the most lovely overall designs and settings for a light in London)