To get Carl Griffith’s 1847 Oregon Trail Sourdough Starter, USA residents can send a self-addressed stamped envelope (68¢ or forever stamp) to their new address in Greeley, CO. If a #10 envelope is not available, postage plus the postal address can be sent, and an envelope will be provided. Only one request per address is allowed, and it is advised to write the address carefully to avoid undeliverable returns. It may take up to six weeks for the starter to arrive, but there have been occasional delays since 2019 that are outside of their control. For international requests, $1.55 US postage or two US one-dollar bills or an International Reply Coupon can be sent instead. Stamps issued by countries other than the US are not acceptable. The starter is free of charge, and donations are appreciated. The brochure containing instructions and recommendations can be read or printed from their website. The sourdough starter is composed of wheat flour, water, and sourdough organisms, and while it is not certified as a foodstuff, efforts are made to provide a healthy and vigorous start. Caution is raised about an eBay site falsely claiming to sell their starter.
https://carlsfriends.net/source.html