Nevertheless, Thygeson was one of those who worked purposefully for Norway's secession from Denmark and the establishment of a Norwegian constitution.

[1] Thygeson made a name for himself when, in the dramatic days of September 1807, he (as the Governor) ordered a British warship to be protected with cannons at Christiansholm Fortress.

He owned Bygholm Manor and held Stamhuset Mattrup at Horsens, Denmark.

In Norway he was the owner of the main farm at Nordre Skøyen in Østre Aker and Brynseng.

[1] Thygeson was a key name in Det Dramatiske Selskab in Christianssand together with Henrik Arnold Thaulow and Nicolai Wergeland, and he was a close friend of the sibling couple Henrik Wergeland and Camilla Collett.