I'm sending a character to Paris in the very early years of the 20th century (c. 1901/2). She's been living in straitened, vaguely Bohemian circumstances in London for several years, but has never before left the country.
Besides the very obvious, what would strike her as being the most immediate differences between the experiences of walking down a street in the two cities, on her arrival in Paris? She's young and middle-class, but poor, speaks some school French, and will be lodging with English friends in Montparnasse, but will range all over central Paris on foot over time. Thoughts on relative dirt/cleanliness, streetlighting, forms of public transport, carriages, paving, parts of the populace likely to be on foot etc etc all welcome.
I'd also be grateful for recommendations of appropriate guidebooks, memoirs or novels (in French or English), which bring a Londoner to Paris at around the turn of the century. A lot of what I've found is either mid-Victorian or 1910/12 onward.