I was called this morning at a quarter before four; went down to the steamboat, which was to start promptly at five, but which did not until half an hour later,--a narrow comfortless vessel, with no awning or protection for the decks, in which point, and in the lack of all comfortable arrangements, it is just like every other steamboat I have seen since I left New York, those between Liverpool and Glasgow alone excepted. The Rhone, even at Lyons and far below, merits pretty well the epithets applied to it, where it “leaves the bosom of its nursing lake,”--“the blue rushing of the arrowy Rhone,” for it is rapid the whole course. At Lyons it has a blue tint like that of the ocean, though not so deep. Well, we were off at length, and aided by the current we made very satisfactory progress. The distance by post between Lyons and Avignon is one hundred and sixty-seven miles, but including all the turnings of the river it must be much more; however, at six o’clock and a quarter the spires and battlements of Avignon, lighted by the setting sun, were in sight, and a beautiful sight they were as we drew near. The wall of the city, built by Pope Innocent VI. in the twelfth century, is still perfect, and very pretty, the architecture being what I should have thought. Moorish (judging from pictures merely); the numerous spires of this very ecclesiastical town rising above it; the huge rocky elevation next the river,--the site of the ancient fortress, and of old temples, churches, etc.,--and not least the ruined bridge of very ancient date, that still throws its beautiful arches half across the river, the lovely Italian landscape around, so fresh and green, the distant mountains encircling the whole, made it altogether as delightful a scene as one could wish to behold. But you must know that I am now in the region of the olive and myrtle, and have in the short space of three days concentrated, as it were, the pleasure we experience in watching the gradual approach of summer. The season is said to be later than usual at Paris; it is like April in New York,--a few warm days, but the evenings all chilly and most of the days raw and unpleasant, The horse-chestnut trees of the Tuileries were just bursting their buds; but every hour since, and particularly to-day, I have noticed little by little the advance. Here nearly all the trees have assumed their foliage,--that pure and delicate vernal foliage which we always so much admire, but which you enjoy very much to come upon in the way I have done, instead of waiting week after week, with every now and then a snowstorm, just to keep winter in remembrance. But I must not forget that I have seen snow also to-day. The summit of Mont Ventoux, which we have had in full sight since twelve o’clock, is covered with snow, its brilliant whiteness contrasting finely with the craggy brown mountains of lesser elevation, as with the green fields and tender foliage of the valleys.