[1] Dettlieb Christopher Jessen was born in Holstein and came to Halifax as one of the Foreign Protestants in 1751, settling in Lunenburg two years later.

He was also present for the defence of the town through the Lunenburg Campaign (1758) during the French and Indian War, in which he wrote one of the rare log books of a militia troop defending against Mi'kmaq attacks.

On one of the patrols of the Lunenburg peninsula, Jessen discovered two British soldiers that were scalped and a 10-year-old boy that was captured.

Captain Stoddard sent a message to Jensen and Pernette that if they advanced on the town, all the homes would be burned.

[4] He was also a justice of the peace, a judge in the Inferior Court of Common Pleas, registrar of deeds and a customs collector.