14th June, 1839.--I rose early this morning and went to hear Martius lecture at the Garden at seven o’clock. He is a good lecturer, fluent and clear. Called on Dr. Schultes;[109] then returned to breakfast; afterwards spent the morning at the cabinet, with the exception of an hour devoted to the library, which one of the chief officers very kindly showed me through. They have about half a million books, excluding duplicates, and about 16,000 manuscripts. The librarian took much pains to explain to me the arrangement and classification of the library, which is in excellent order, and to show me as many of the rarities as I desired to see: very ancient Greek and Latin manuscripts of the Bible or the Evangelists; a number of very old and richly illuminated German manuscripts; the collection of printed books without date, of which they had 6000 (these early printed books being many of them intended to pass for manuscripts); a copy of Faust’s Bible again (the first book printed),--they have two; Luther’s Bible, beautifully printed on vellum, and illuminated,--in the frontispiece his original portrait, a sturdy-looking old fellow, who looks as if he might have been as fearless as indeed he was; the portrait of Melanchthon, by the same artist, whose name I forget, is given on the next leaf. I saw also a manuscript letter of Luther, and many other things, too tedious to trouble you with now. Dined with Martius and his very pleasant family; stayed until six o’clock, looking over plants, etc.; took a little walk, now that it is a little cooler, for the day has been exceedingly sultry, and am now going to bed, as I have to rise at half past four and meet the pedestrian portion of the Linnæan party at half past five. If it be as sultry a day as this has been we shall have warm work of it.