Advice given to a certain Fyodor Nikitich Samoilov, in 1914:
Now – quiet, sunshine, sleep, food. Take care of all this. Do they give you enough to eat?
You should drink more milk. Do you?
You should weigh yourself once a week and make a note of it each time.
You should go and see a local doctor at least once in 10 days, so that he can check the progress of your cure. Have you the doctor’s address? If you haven’t, write to me and I shall find it out for you.
The main thing is sleep (how many hours do you sleep?), sun and food, especially milk.
Lenin, Collected Works, vol. 43, pp. 387-8