My dear Sir

I hope to bring the shells (if it be convenient to you) about eleven oclock, on next Thursday morning.— If you will not be at home, would you kindly send me a line by return of Post: if I do not hear, I shall understand, that my visit will be convenient to you.—

I hope I shall not fail this time, but my engagements must always be uncertain, owing to the great uncertainty of my health.

Believe me | dear Sir | Yours very faithfully | C. Darwin