My dear Sir

I thank you cordially for all the great trouble, which you have so kindly taken for me.— Positively I have never seen your paper by Morren, or heard of its existence, except in your previous note.—² I will write to Gardeners’ Chron. & see whether Lindley knows.—³

I do not possess Todds Cyclop. of Phy. &c:⁴ is there an article on the fertilisation of Orchids?

I received last night the two Sphexes, & I thank you much for so kindly sending them; but unfortunately the pollen-masses do not belong to Orchids (I have removed only one) but to Asclepias, which abounds in N. America, & requires, equally with Orchids, insect-aid.—⁵

I am really sorry to trouble you, but how can I return the insects if not by Post? Shall I leave them at the British Museum in D^r Gray’s hands, addressed to you, when I next go to London?⁶ But I shall not be in London for a month or two.— When you write to tell me what to do, will you tell me about Todd.—

With many thanks | Yours sincerely | Charles Darwin