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A perambulator, Katchor has always been expert at capturing the texture and sociology of vanishing aspects of city life.

It was as thick around its girth as a perambulator.

In one exchange, he said: "Mr Speaker, we have got perambulators and nannies into this session, which I think must be a first for questions to the Leader of the House."

But San Francisco coaxed out my inner perambulator.

On the way we meet the fleeing inhabitants trundling their goods and chattels along with them in wheelbarrows, in perambulators, and on their backs.