The Tomöscher Pass—Projected railway from Kronstadt to Bucharest—Visit to the cavalry barracks at Rosenau—Terzburg Pass—Dr Daubeny on the extinct volcanoes of Hungary—Professor Judd on mineral deposits.A ride through Szeklerland—Warnings about robbers—Büksad—A look at the sulphur deposits on Mount Büdos—A lonely lake—An invitation to Tusnad.CHAPTER XXI.