I have got so far behind in my botanical news that I despair of bringing up arrears, and must leave very much to tell you in propria persona, if we meet again. I fancy I have not very much new to learn on the Continent about microscopes and modes of working. I have seen much of all the best people here, last not least Valentine, who lives in the country, from whom I have derived much useful knowledge. He works to some account, which can’t be said of most here, who, though they have the best instruments in the world, don’t turn them to any important account. As to Sullivant, tell him to have great patience. I can get him a capital simple microscope by Ross for six guineas, but I want to get as useful a one for him cheaper, so I shall wait till I have been on the Continent, I think. My plan is to purchase at Paris for him, where the low powers are good as can be, and supply a lens or two here.... Chapmannia (!) exists in Bartram’s old collection here, which you saw at British Museum, and some other very lately published things. I bought a copy of “Flora” for Bennett the other day, thinking it worth while to offer him something, as I was taking up much of his time. To-day he gave me a copy of the published part of the “Plantæ Javanicæ Rariores,” (£2 10s., plain, is the publishing price), an invaluable work, containing very many notes and observations on various genera, etc., both by Brown and himself, which it is quite necessary we should see. The notes I have made for the last few days are not now before me, so that I cannot now give you any remarks. There is no one thing of very considerable importance, but much small matter. By the way, let me say that Bennett thinks that Brown thinks Romanzovia to be hydrophyllaceous! Bentham would give something to know this, but I shall keep it to myself. I have made out the remainder of Pursh’s doubtful Arenarias and Stellarias front the Banks herbarium. The parcel of Solidagos, etc., sent to care of Mr. Putnam, I am glad to say, came to hand. It did not arrive until last week, however....