To Daniel Oliver [31? October 1860]1
15. M. P. | Eastbourne
My dear Sir
Just received your letter. which I have hardly read—2 I write before morning post, to say, that I did not suppose you would care to look at the movement in Drosera;3 (I am very glad), else I would have told best way, viz to take Hairs lately inflected over a fly, cut off, & put either dry or in water between glass, under high power ( object) make a sketch of shape of red matter, & look again in 1 or 2 minutes.— There is, also, sometimes a strong circulation in the cells.— I refer to cells of footstalk of round-headed marginal Hairs—
Yours [illeg] | C. Darwin
The best way to see cell movement in Drosera hair, is to cut off those lately inflected over a fly, sketch shape of red matter under high power, and repeat after one or two minutes.