_29th._ We quitted Aussee this morning, and drove on through Mitterndorf, Steinach, and Liezen, our road lying through beautiful Alpine country, sometimes hilly, and always at a great elevation. Between Liezen and Rothenmann we passed the first old feudal castle that we have seen in this part of Austria; it is called Wolkenstein, and is finely situated upon a hill, between rocks and woods. Most of these people have large _gôitres_, the cause of which it is perhaps difficult to ascertain with certainty. Sir Humphry seemed inclined to attribute their presence to the calcareous earths which the waters of these vallies may hold in solution. This opinion has been also supported by many scientific medical men; still Sir Humphry seemed to think there was reason in my observation, that it might rather be the effect of climate and damp; for in a mountainous country that is also full of streams, the inhabitants are always exposed to strong currents of damp and chilly air at one season, and to the extreme of heat in the summer months, when the rays of the sun are reflected from the rocky mountains, and, as it were, concentrated upon the lower vallies; for were it from the water, would it not, in an equal degree, affect the upper classes, which, I have observed in the neighbourhood where I have resided, is not the fact; for though they are subject to this disease, they are by no means so much so as the poorer inhabitants of the villages in the Odenwald, for instance; and the water of many of these parts has been proved to be more than usually free from earths and salts.