During an interview with astronaut T.K. Mattingly, he reflects on the Apollo 8 mission and the challenges they faced. Mattingly describes the numerous questions that arose, and the need for a systematic approach to address them. This led to meetings organized by Bill Tindall, where they would delve into the complex issues at hand. Tindall would then summarize the discussions in what became known as Tindallgrams, written in a folksy style that everyone eagerly anticipated. Mattingly considers these Tindallgrams a prized possession and a testament to Tindall’s remarkable skill. The content includes links to collections of Tindallgrams for those interested in further exploration.
https://www.nasa.gov/history/alsj/alsj-Tindallgrams.html