Dickens to M. De Cerjat, Page 3.
On this page of the letter, Dickens writes about the new Thames embankment and, in the last paragraph, about his health:
Your undersigned friend has had a few occasional reminders of his "true American Catarrh." My Doctor is of opinion that the disorder in question originates in vegetable poison; and has attacked it with strong and sudden doses of quinine in hot brandy and water. They have been remarkably effectual. Although I have exerted my voice very much, it has not yet been once touched. In America [continuing on page 4] I was obliged to patch it up constantly.