CHT293697 Erratic Blocks and Rocks at the Saint Gothard Pass in the Swiss Alps (w/c on paper) by French School, (19th century); Private Collection; (add.info.: Blocs Erratiques et Roches Moutonnees au col du St. Gothard; from a collection of geological drawings in the Paris Faculte des Sciences; bloc erratique; stone transported from its origin by agency of water, ice or other cause;); 穢 Archives Charmet; French, out of copyright.