Norman Ball is a retired university professor who loves visiting Paris and wandering about the city. He is the author of half a dozen books on the history of technology and is currently doing research on the technologies of communication among the blind: typewriters, Braille-writers, and more.
Philippa Campsie is a Toronto writer who studied in Paris as a university student, and has never quite got Paris out of her system ever since. She collects Paris maps and travels there with Norman as often as possible.
The fallen tree at the top of the blog is called l’Arbre des Voyelles, the Tree of Vowels, and it is a sculpture by Giuseppe Penone, installed in the Tuileries Gardens in 1999.