Johann Gottfried Gurlitt, Observations Concerning Preparatory Instruction for the University, especially in Hebrew, Hamburg, 1810 in: Notice of Lectures in the Academic High School of Hamburgakademisches Gymnasium, held from Easter 1809 until Easter 1810, as well as Announcement of Lectures from Easter 1810 until Easter 1811, Hamburg 1810, pp. 3-16, here pp. 9-10.