William Augustus Brevoort Coolidge, 1911 Encyclopædia Britannica, Volume 9… (1911)
“ Originally under the protection of the counts of Rapperswil (to which town on the lake of Zürich the old pilgrims’ way still leads over the Etzel Pass, 3146 ft., with its chapel and inn) , this position passed by marriage with their heiress in 1295 to the Laufenburg or cadet line of the Habsburgs, but from 1386 was permanently occupied by Schwyz. A black wooden image of the Virgin and the fame of St Meinrad caused the throngs of pilgrims to resort to Einsiedeln in the middle ages, and even now it is much frequented, particularly about the 14th of September. ”
