This route runs from the Eiffel Tower to Pere Lachaise Cememtery, and I've seen it mentioned several times. Why go underground when you can take the bus and see the scenery? Eiffel Tower, Ecole Militaire, rue Cler, Les Invalides, Louvre, Ile de la Cite, Ile St. Louis, Hotel de Ville, Pompidou Center, Marais, Bastille, and Pere Lachaise. One ticket from your carnet gives you 1.5 hours to complete your one-way trip, jumping on and off buses as often as you like (but not the Metro). Board through the front door, validate your ticket in the machine behind the driver. Push a red button to let the driver know you'd like to get out at the next stop. Exit through the rear door. Buses run every 10-15 minutes (7:30-21:15) but not on Sunday. Karin Ling mentions 69 in GoNomad.com (as well as some other interesting stuff) and notes that
"This very bus takes you to Belleville, where market stalls line the main boulevard on Tuesday and Friday mornings. Though the food market is traditionally a French phenomenon, at Belleville it’s gone through an evolution of its own: the fruit selection is more exotic, the permission to touch the produce more explicit...The neighborhood is at the crossroads of several cultures"
Continue reading and she talks about the "Bibliothèque Publique d’Information. Enter from the back of Centre Pompidou for an airy space with more than your predictable library offerings (television & language "tapes"), all free of charge."
And I discovered a company, Paris Bus Cards, that actually sells a set of cards that provide bus itineraries. Here is the link to Itinerary 3
which includes..."Get off at the St-Paul stop. It’s a fun shopping street. La rue St-Paul, with its many interesting shops and bakeries, is a delightful place to stroll."
I just ran across 
This small book follows the tastings of Jeanette and Georgette as they "stalk the sweet life on the streets of Paris." The way that Georgette (Joyce Slayton Mitchell) writes, you'd think she was a young blogger but she's written 34 books and there is a photo of a pair of middle-aged women on page 162 which I assume are the author and her sidekick "Jeanette". Though not slender they are nothing like the roadtripping Jane Stern so they mustn't be visiting 12 patisseries a day.
Last night we watched the documentary film about the Pere Lachaise Cemetery in Paris and it was worth its 95 minutes. It isn't a travel film but a study of people and burial customs, I guess you could say (they even interview an embalmer and show him touching up a beautiful corpse -- was she really dead?). Sure, they visit the tombs of famous people like Modigliani, Chopin, Marcel Proust, and Oscar Wilde but it is the relationship that living people have with these tombs that the director concentrates on. And, yes, it makes me want to go visit the cemetery, although it was filmed in the spring or summer when it was bright and sunny and when we go in March it is bound to be a bit grayer. I'm not sure that it inspired me sufficiently to read Proust's À la recherche du temps perdu but the 
For instance, you can learn about the 
And it is definitely 239 Reclamation Street that has the store with lots of baskets, just north of Waterloo Road.
