In today's episode, we'll be talking about stamps, erasable ink, and the history of envelopes.

USPS Price Increase, First Class Letter going from 55 to 58 on August 29th:

https://about.usps.com/newsroom/national-releases/2021/0528-usps-proceeds-with-request-for-postal-rate-change.htm

https://en.wikipedia.org/wiki/History_of_United_States_postage_rates#/media/File:US_Postage_History.svg

https://about.usps.com/newsroom/national-releases/2021/0518ma-usps-announces-upcoming-stamp-dedications.htm

https://about.usps.com/newsroom/national-releases/2020/1117-usps-announces-upcoming-stamps.htm

https://www.fountainpennetwork.com/forum/topic/351973-erasable-fountain-pen-ink/

http://letterlocking.org/categories

https://www.wsel.com/sites/default/files/uploads/pdfs/EMA_History.pdf