[London,] 9 August 1857

Dear Engels,

Today I am prevented from writing more than a few lines—
just my best wishes for your recovery. My anxiety for your bodily welfare is as great as if I myself were ill—greater,
perhaps.

How are things in regard to ‘coughing’? So far as I can judge
from your letters, at least you’re not much troubled with it.

My doctor, who has treated a great many cases such as yours,
says that if a patient’s condition does not permit of his bathing in
the sea, he has successfully prescribed washing all over in heated
(TEPID) sea water, the temperature being gradually reduced.

Let me know whether you are taking iron. In cases such as
yours, as in many others, iron has proved stronger than the
affliction.*

Salut.
Your
K. M.