My dear D^r. Lindley

I thank you sincerely for your information.² Your tracing shows that the species is saccatum beyond a doubt.—³ I wrote to Gardener’s Chron. as I thought it would trouble you less to answer in that way.⁴ I am very much obliged.— I have been extremely much interested with Catasetum, and indeed with many exotic Orchids, which I have been looking at in aid of an opusculus, on the fertilisation of British Orchids. I very much fear that in publishing I am doing a rash act; but Orchids have interested me more than almost anything in my life. Your work shows that you carefully understand this feeling.⁵

Yours very sincerely & obliged | Charles Darwin