He was also a prolific writer of letters, papers, pamphlets and newspaper articles covering a wide variety of subjects, and for a period was an associate of the famous botanists Joseph Banks and William Jackson Hooker.

With the help of other crew members, Jørgensen managed to arrest the governor and proclaimed himself 'Protector', promising that he would reinstate the Althing as soon as the Icelandic people were able to govern themselves.

With the arrival of HMS Talbot two months later, Danish government was restored and Jørgensen was taken back to England and tried by the Transport Board, who found him guilty of breaking his parole while a prisoner-of-war.

Jørgensen spent the next few years in London, where he began to drink heavily and gamble compulsively, building up substantial debts which eventually led to his conviction and incarceration.

Following correspondence with the British Foreign Office, Jørgensen was recruited into the intelligence service, where he translated documents and travelled throughout France and Germany as a spy as the Napoleonic Wars drew to a close.

Upon returning to England, Jørgensen continued to write various reports, papers and articles but after being accused of theft in 1820, was imprisoned in Newgate Prison, released, and sent back there when he failed to leave Britain (a condition of his parole).

In 1827, after he helped prevent the circulation of forged treasury bills, a group of local merchants headed by Anthony Fenn Kemp petitioned the governor for Jørgensen to be granted a ticket of leave.

[5] Jørgensen led several explorations of Tasmania, and was employed by the Van Diemen's Land Council as a Constable, taking part in the 'Black Line' Aboriginal clearance exercise.