Eratosthenes? Prime fella.
Anyway, wot I lurnt today was that pre- and maybe post-WW2 French bistros had a supply of writing-paper for the use of their clients. Simone de Beauvoir used to repair to the local bistro every time she wanted to write a letter, and mentions a barman telling someone "no, I can't give you writing-paper unless you order something". People used to sit there writing all day, drinking coffee, eating lunch, dinner etc. Nice work if you can get it.