The Nuttall Encyclopedia
A valley in the Tyrol, watered by the Ziller, an affluent of the Inn, some 400 of the inhabitants of which were in 1837 obliged to seek a home elsewhere because of their opposition to the practice of auricular confession, and which they found near Liegnitz, in Prussian Silesia.
Wood, James, ed. Entry for 'Zillerthal'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/z/zillerthal.html. Frederick Warne & Co Ltd. London. 1900.