a question

The National Galleries of Scotland have joined Flickr (which is super super cool in and of itself), and I was perusing some of their images when I came across this one:



and the title for this image is: "Captain Robert Barclay-Allardyce, 1779 - 1854. Celebrated pedestrian.

What I would like to know is how does one become a "Celebrated pedestrian"??


That is a title worth pursuing, if you ask me!