[1] Karl's passion for human rights and the dignity of man as they pertained to the conditions of the people of Congress Poland left a deep impact on Friedrich, which he himself would acknowledge years later.

Pfeiffer's time in Marburg was particularly contentious, because the court expected him to help them perpetrate what in his eyes was an undue and unnecessary campaign against the Friends of the Light, a rationalist and humanist protestant sect then developing in Germany.

[6] In 1850, having sufficiently angered Ludwig Hassenpflug during his time in parliament, Pfeiffer was relegated to the position of superior court judge in Fulda.

This was not, however, a perfect solution to the problem he had left behind in Hesse, because adapting to a new city with new customs and people was stressful to both Pfeiffer and his family.

[3] He briefly considered attempting to regain a foothold in his fatherland by acquiring the deed to his family's now defunct paper mill in Niederkaufungen, but that plan proved fruitless.

[9] From 1852 to 1864 Pfeiffer served as a high court attorney, and on 15 July 1864 he was elected a member of the Senate of Bremen, a post which he would hold until his death.