My dear Dyer,

One line to thank you much about Myrtensia. The former plant has begun to make new leaves, to my great surprise, so that I shall be now well supplied.¹ We have worked so well with the Averrhoa that unless the second species arrives in a very good state it would be superfluous to send it.² I am heartily glad that you & M^rs Dyer are going to have a holiday.³ I will look at you as a dead man for the next month & nothing shall tempt me to trouble you. But before you enter your grave aid me if you can. I want seeds of 3 or 4 plants (not Leguminosæ or Cruciferæ)⁴ which produce large Cotyledons. I know not in the least what plants have large cotyledons. Why I want to know is as follows. The Cotyledons of Cassia⁵ go to sleep & are sensitive to a touch; but what has surprised me much is that they are in constant movement up & down. So it is with the cotyledons of the cabbage; & therefore I am very curious to ascertain how far this is general

With many thanks for your invaluable assistance | Yours very sincerely | Ch. Darwin