It was the year of the first great World’s Exhibition, and the building was then considered very wonderful. Through the kindness of Professor Lindley he was enabled to see it before it was completed. There was a very charming visit to Oxford in March, where Dr. Gray made most delightful acquaintances. He there first met Dean Church, then a fellow of Oriel, who had him to dine. He also dined with Mr. Congreve[14] at Wadham; met Maskeleyne, who showed him “some fine talbotypes, which are a sort of daguerreotype on paper, and have a beautiful effect for landscapes and buildings.” Breakfasted with Mr. Burgon and Mr. Church, at Oriel, in Dr. Pusey’s old rooms, and met Mr. Burgon again at dinner, when dining in the “Common Room,” at a dinner given him by Mr. Church, and also Buckle and Sclater. Dr. Jacobson, then Regius professor of divinity, afterwards Bishop of Chester, and Mrs. Jacobson, were very kind. Dr. Daubeny was then professor of botany at Oxford, and there were some plants to look at in the small herbarium kept in the little Botanic Garden in an old greenhouse. The days were crowded with interesting sight-seeing and in meeting agreeable people. From Oxford, Dr. Gray went to Cambridge, where he met again a traveling acquaintance made on the passage from Rotterdam, Dr. Thompson, then Greek tutor, later Master of Trinity, who was very kind in doing the honors of Trinity, King’s Chapel, etc. At his rooms, Dr. Gray met Professor Challis and other Cambridge men. The grounds about the colleges were then at their greatest beauty, the banks of the Cam yellow with primroses, the whole setting off the beautiful bridges and stately buildings. Another traveling acquaintance met in the street, recalling an experience on the Furca, asked Dr. Gray to dine with him at Caius College, saying his name was Mackenzie. He was Bishop Mackenzie, who died in south Africa. On returning to Kew, Dr. Gray found Dr. Joseph Hooker, just back from his journey to the Himalayas and Thibet. Dr. Thompson[15] was also there, just home from India, where he had been imprisoned with Lady Sale and others, twenty of them in one small room, during the trouble in Afghanistan. And one day came an invitation to lunch from the Hookers’, “to meet Mr. Darwin, who is coming to meet Dr. Hooker; is distinguished as a naturalist.” “Mr. Darwin was a lively, agreeable person” [Mrs. Gray’s journal]. TO A. DE CANDOLLE. 5 CUMBERLAND PLACE, KEW, April 14, 1851.