Various notes, letters and papers dated from around the 1800s to 1880s from Johann Jürgen Sickert (1803-1864) and Oswald Adalbert Sickert (1828 – 1885), Walter Sickert's grandfather or father respectively. The papers are in (High?) German or Danish. Some papers are dated.
Not able at this stage to ascertain exactly who wrote the papers. Possibly other authors other than J.J. and O.A. Sickert.