Dr. Gray enjoyed the visit to Geneva, where he renewed his friendship with MM. Alphonse De Candolle and Boissier, accomplishing some useful work, and having pleasant social meetings and excursions. He went to Chamouni and the Bernese Oberland; then to Munich, especially to meet again Martius, with whom he had been in constant correspondence, and who made the journey from Tyrol to greet his old friend. Their few days together were greatly enjoyed. He returned to England, going down the Neckar by steamboat to Heidelberg, then down the Rhine, and through Holland, where he saw Miquel[9] in Amsterdam, rambling with him on a fête-day through the streets at evening, enjoying the queer sights; went to Leyden, meeting De Vriese,[10] with whom was R. Brown (then staying in Leyden for a few days), and seeing the Botanic Garden, one of the oldest in Europe, and well known to Linnæus. Blume[11] he missed, but he saw Siebold’s[12] collection of Japanese curios, then most rare. He took steamer from Rotterdam to London, and after a few days went down to Mr. Bentham’s, in Herefordshire. Here were spent two months of very hard work with Mr. Bentham, who most kindly went over with him the plants of the United States Exploring Expedition, which had been brought over the Atlantic for the purpose. Pontrilas is in a pretty, hilly country on the border of Wales, with many old churches, almost of Saxon time, in the neighborhood, to give interest to walks, and very interesting, agreeable neighbors for a day or two’s visiting, among them the authoress, Mrs. Archer Clive, who was very kind. He left Pontrilas early in December to make a visit, at Dublin, to his friend Professor Harvey, to stay in the family of Mr. and Mrs. Todhunter, Dr. Harvey’s sister. Going on board the steamer at ten in the evening, he met with the severe accident of which he gives an account in his letters. Dr. Harvey came from Dublin to help in nursing him. His vigor and elasticity helped him to a speedy recovery, but it increased a general tendency to stoop, and he was never so erect afterwards. He was able to get to Kew the last of December, and spent the winter in hard work in Sir William Hooker’s herbarium, which was then in his house at West Park. TO A. DE CANDOLLE. CUMBERLAND PLACE, KEW, December 28, 1850.