We had a pleasant passage from Cologne to Coblentz, and from thence to Mayence, because we had pleasant company. It is singular, but it is a fact, that you go on board a steamboat to avoid fatigue, and each night you are more tired than if you had travelled by land. You go to avoid dust and heat; the first is exchanged for blacks out of the funnel, and you are more dirty than if you had travelled twice the distance; and the heat is about the same; in these points you certainly gain nothing. The expense of these Rhine steamboats is very great. By a calculation I made--to travel by post, five persons in a carriage, from Cologne to Strasburg--you will expend 200 and odd francs less than by the steam conveyance. In time you certainly lose by steam, as you are four days and a half going to Strasburg, and by land carriage it is half the distance, being only forty-five posts. Neither do you save trouble; for the steam-boats being changed every evening, you have to take your luggage on shore, shift it from one to the other, and, at the very time that you are least inclined to do anything, independent of an enormous expense which you ought not to pay, but cannot well resist. Now, as you really gain nothing in the above points, it is at least to be supposed that you gain in the picturesque; but this is not the case: and I have no hesitation in asserting that those who go up the Rhine are generally disappointed, although they do not like to say so. They expect too much.--The vivid descriptions, the steel engravings, have raised their anticipations too high; and they find that the reality is not equal to the efforts of the pen and pencil. Several of the passengers acknowledged to me that they were disappointed; and I must confess that I hardly knew the Rhine again. When I travelled up the Rhine by land I thought it beautiful; but in a steam-boat it was tame.