A long-form independent journal on horology, with essays that combine archival research and close object study, such as tracing the identity of a longitude watch's maker and examining an unusual sarcophagus-shaped watch. It also covers the history of navigation and the longitude problem.

Chartbook is Adam Tooze's newsletter on economics, geopolitics and history, offering longer and more freewheeling analysis than his journalism. Recent issues feature curated top links alongside essays on topics like US current account and AI investment, Treasury markets, Indonesia's economic crisis, and historical episodes.

Niall Ferguson's Time Machine is a Substack newsletter from historian Niall Ferguson that uses historical analysis to examine current economics, politics, and culture. Issues cover topics such as European protests and debt, American founding principles, election-year risks, and newly unlocked Nixon White House tape transcripts.

A daily history newsletter that retells dramatic events that happened on the same calendar date, with narrative detail drawn from primary and historical sources. Readers get vivid, well-researched accounts of moments like plane crashes, battlefield surrenders, and Cold War crises.