Some days Dan or I would take a bike -- the boat came with six -- and go on ahead. I had to pull over into the grass one morning as a troop of young army recruits pedaled past, most saying "bonjour" or "merci" as they did. In their close formation and Lycra outfits, they looked like a mini Tour de France. I marveled at their steadiness while at the same time wondering in what war the military rides bikes.


In Pecherac we all rode into town after lunch on the boat. Graham and Barb climbed on the seesaw in the park next to the church, making the day of one female resident. "C'est pour les enfants," she sniffed as she walked with her daughter. "Ils vont le casser." ("It's for children. They're going to break it.") Then, indignant and satisfied, she climbed into her car.

Nothing broken, we sailed out of town, and docked for the night just past a lock. A row of RVs, a few with British license plates, lined the south bank. Their owners had set up chairs and folding tables between their vehicles and sat drinking wine or playing cards. Waterless barging.

A pretty restaurant with a yellow-and-blue awning, Le Moulin de Trebes, stretched along the north side of the lock. After the requisite three hours, we asked our waiter to divide the bill three ways (one for each hour). He brought the credit card machine to the table -- this seemed to be the accepted practice -- and then said to Graham: "You owe 59 point four six, six, six, six, six, six ..."

"Breakfast at sea," Graham announced the next morning, standing at the wheel. We made a sharp turn through downtown Trebes, passing an old man in suspenders standing in his backyard, and entered again the long green tunnel. Shortly, another delicious egg dish made its way up from the kitchen.

Three hours and six locks later, we arrived in Carcassonne. It was strange and a little disconcerting to see apartment houses and graffiti again, though the soothing plane trees had not abandoned us. We docked next to a stand, and took our turns heading into town, each couple carrying a small shopping list.

Hania and I climbed the hill, took a walk through the ancient citadel, admired the stained glass windows of Basilica St.-Nazaire. Heading back into town, I read the graffiti on the stone footpath: "When an old man dies, a library burns."

We found a health food store, though there were no fresh gluten-free breads. The woman at the cash register said quite a few people come in with children who become sick from eating baguettes. "We say in this store that flour is public enemy No. 1." It seemed a strange sentiment to hear in France.

Then we went to buy cheese and sausage. The man gave me a taste of saucisson Roquefort. A wedge of fat lodged between my teeth and stayed there till I got back to the boat. French food, the food that gets you back.

In the supermarche near the canal, we bought milk, ham and eggs. Yes, we were tourists, but we were also grocery shoppers. It gave us, I thought, a certain prestige. A fellow boater, an Australian, was trying to convey to a young employee that he was looking for peanuts.

"Cacahuetes," I said.

"Ah," the store clerk said, with the joy of the newly enlightened, "peanuts c'est cacahuètes!"

In the evening, we took a taxi to a hotel restaurant overlooking the floodlit citadel. "Bon appetite," said the driver, dropping us off. The dining room was crowded with a package tour. Barb, after tasting her rose, said: "It starts out with great promise but in the end disappoints."

"Sounds like my prom night," said Dan.

A day of locks. They had moved from an education to an annoyance to a kind of welcome interlude. They gave us something to do. I started talking to the keepers. One told me that there was more traffic this year than in any since 2001. We had assumed the real crowds come in July and August, but he said no, as the prices go up then. It was June, so we were probably at the height of the season.

A middle-age woman said not all lockkeepers live in the lockkeeper's house; sometimes it's a family that agrees to care for the grounds, or run a little store. (A number of the locks sold regional products such as honey, jam, wine.) She had lived in this house -- the standard tan two-story with pale green shutters -- for 21 years, though had worked on the locks for 30 altogether.

"Ask her if anyone's ever fallen into the canal," Dan said.

"In 30 years," she said, "I've seen maybe two people fall in."

Farther down, a lockkeeper stood talking to a friend, who noted the name on our boat.

"Lully," he said. "He was a composer, I think, during the time of Louis XIV."

We docked for the night next to a field. There were no other boats. The week's first rain started falling, so we ate inside: Barb's delicious veal stew. Then, with the rain tapping the windows, Dan brought out his harmonica. Donnette lit a candle. We sang around the campfire. Folk, rock, Beatles; even world music: Milord, Kalinka, Guantanamera, Molly Malone; Hania threw in a few Polish songs. I wondered if younger generations will have this reserve of (mostly) shared melodies, or if, in situations like this, they'll just sit around and listen to their iPods. We sang late into the night, as if we were the only people in the world.

In Castelnaudary we docked in front of the police station and went our separate ways for lunch. In the afternoon we climbed our last lock and drifted into Le Segala. A row of two-story houses faced the canal, anchored at the far end by a restaurant-cafe. Exploring, we found that this was pretty much the town, with the exception of the tile factory behind the facade. We cleaned the boat and headed to the restaurant for dinner.

The patronne was an unsmiling, heavy-set woman who spoke decent English. I had the worst meal of the trip -- tough frog's legs and even tougher steak -- but the setting was lovely, and the darker it became, the lovelier it got. The outdoor tables filled slowly. A small band, synthesizer and accordion, played softly. Our last night on the Canal du Midi.

The crew of the barge that had been following us -- the three floozies and their captain -- made an appropriately late appearance and we all smiled at each other like old but distant friends. Two little girls in summer dresses chased paper airplanes while their untroubled parents smoked and talked. A South African couple, the man in a straw hat, danced a tango. Then the patronne grabbed one of the floozies -- her face red from the sun -- and they danced between the tables and out into the street. It was like watching a Piaf song come to life.

If you go:

There are numerous canals in France; we chose the Canal du Midi as it seemed to promise the best weather in June. And it came through, with warm days and cool nights (so we didn't miss air conditioning). Though we were lucky, as the South of France can get very hot, even in spring.

Boat rental:

We used a company called Rive de France (011-33-810-80-80-80; houseboat-france.com/rive-de-france.html), which also operates in other regions of France. We rented the boat for one week, picking it up in Colombiers (a little west of Montpellier) and dropping it off in Le Segala (a little east of Toulouse). You can rent for longer, just as you can go both ways, but it seemed redundant to retrace our route.

Prices vary according to the size of the boat and the time of the year. If we were doing it this year at the same time (second week of June) with the same boat, the one-week rental would cost about $3,615. The price goes up after June 20, and then goes up some more after July 5. (The season runs from March 21 to the first week of November.)

Because of the kitchen facilities, you can save some money by cooking your own meals. Towels, linens, plates, glasses, silverware, even bikes, are all included.