Dr. Gray, with Mrs. Gray, landed in England, April 18, and went from Liverpool to stay at Sunningdale with Sir Joseph and Lady Hooker, where a quiet, restful week was most pleasantly passed. He went to London the first of May for a few days, meeting again old friends, dining with them, and dropping in for calls, “to report himself,” as he said. He did a little work at Kew, going back and forth; then crossed to Paris, finding at the Jardin des Plantes what he had especially wanted to see, Lamarck’s herbarium, which had been acquired since he was last there. It completed satisfactorily his studies in Asters, as he had now seen everything of the genus to be found in herbaria of importance. A journey in Normandy with Sir J. D. Hooker had been planned for May, but Sir Joseph was unable to leave England, so Dr. Gray arranged to go to Vienna. He greatly enjoyed the railroad journey from Bâle, in May, the fruit-trees white with blossoms about Lake Zurich, then the wilder mountain scenery, and Salzburg, all bringing back the memories of his first European journey forty-eight years before. TO A. DE CANDOLLE. HERBARIUM, KEW, April 23, 1887. MY DEAR DE CANDOLLE,--You will be a little surprised at the sudden transfer of Mrs. Gray and myself to England; but I wanted a vacation and one more bit of pleasant travel with Mrs. Gray while we are both alive and capable of enjoying it. Whether I shall look in upon you at Geneva is doubtful, but it may be, even for a moment. We never expect to have repeated the pleasant week at Geneva of the spring of 1881. We expect to go to Paris early in May, but subsequent movements are uncertain. Always, dear De Candolle, affectionately yours, ASA GRAY. TO ----. May 15, 1887.