Letters referenced from the homepage:

1. Jan  Ambjorn, 13 July 2021, The Netherlands
2. Zeng-Bing Chen, 30 July 2021, China
3. Laura Dattaro, 3 August 2021, NYC
4. Bill Gates, 2 August 2021, Seattle
5. Amanda Gefter, August 2021, Boston
6. Emma Haruka Iwao, 22 June 2021, Japan-Seattle, Google
7. Jerzy Jurkiewicz, 13 August 2021, Poland
8. The Obamas and Valerie Jarrett, 4 August 2021, DC
9. José M. M. Senovilla, 24 July 2021, Basque Country, Spain
10. Michael J. Shelley, 5 August 2021, NYC
11. Walter D. van Suijlekom, 5 August 2021, The Netherlands

And, more to come, ordered by last name, with date and destiny!