This is the first time I have slept in a genuine German bed,--a feather-bed beneath, and an eider-down bed the only cover. It is inclosed in a sheet like a pillow-case, and under this you creep. In the winter it might do very well, but at this time of the year it is very oppressive. The upper sheet here I find, in all cases, is tied fast to the coverlet, which is all of one piece, and just long enough to cover a moderately sized man like myself from the chin to the toes. A taller person must choose between his shoulders and his toes, for they cannot both be covered. Living is dear in Vienna. I stopped at a cheap hotel, being aware of this, and lived as economically as I well could, but I find I have made way with a very considerable sum. The only way to travel cheaply anywhere on the Continent is not to be in a hurry, and to understand the language. Notabilia for Dr. T.--I have seen Corda[105] at Vienna. He is one of the curators of the collection at Prague, and was at Vienna on a visit. Learning that I was there, he called and left his card. I afterwards saw him at his hotel. He is a little fellow about thirty, with a small expressive countenance. He works chiefly at minute fungi, on which he is publishing a large work. I saw a part of it in London. He showed me an immense quantity of drawings, which he makes with great rapidity. He is also publishing a work supplementary to Sternberg’s “Flora of the Former World,” a work of which Corda did a good part. He gave me two copies of a lithograph of Count Sternberg,--now dead, as you know,--done by himself. I observe by his drawings that he has anticipated an unpublished discovery of Valentine’s, which he showed to Lindley and myself in London, about the holes in the tissue of Sphagnum opening exteriorly. I looked at Corda’s microscope (one of Shiek [?] at Berlin), but it is inferior to the English or Chevalier’s. I made a second visit to Fenzl, as he lay in bed; had a long botanical talk with him, and think him a most promising botanist.