From 1777 to 1783 James Boswell was a columnist for the London Magazine, writing a total of seventy essays under the pseudonym the Hypochondriack.
Gerhard Christiaan Rücker
Professor of law at Utrecht University (around 1760).
Possibly the Johann Gerhard Christian Rücker (1722-1780) who was sometime professor at Groningen.1
Life with Boswell:
Boswell went to Rücker's lecture on September 20, 1763, before settling on following Professor Trotz's lectures instead.