One of the great pleasures of writing about this subject was that, instead of a few great experts, walking has a multitude of amateure—everyone walks, a surprising number of people think about walking, and its history is spread across many scholars’ fields—so that nearly everyone I know contributed an anecdote, a reference, or a perspective to my researches. The history of walking is everyone’s history, but my version of it particularly benefited from the following friends,
