Welcome to the book Facts about Tobacco, 3d ed, by Edward P. Thwing (1879).
Tobacco pushers and their accessories conceal the breadth of tobacco effects, the enormity of the tobacco holocaust, and the long record of documentation.
The concealment process is called the "tobacco taboo." Other pertinent words are "censorship" and "disinformation."
Here is the text by Edward P. Thwing (1830-1893) of an early exposé (1879) of tobacco dangers. It cites facts you don't normally ever see, due to the "tobacco taboo."
The phrase "tobacco taboo" is the term for the pro-tobacco censorship policy—to not report most facts about tobacco.
As you will see, information about the tobacco danger was already being circulated in 1879, 85 years before the famous 1964 Surgeon General Report. Be prepared.

Facts about Tobacco, 3d ed
by Edward Payson Thwing
(New York: Barnes Pub, 1879)

[In interim, pending completion of this site,
you can obtain this book via your local library.

And, as Thwing is repeatedly cited
in authors from that era,
authors whose writings can
sometimes be found at this site,
you may do a search his his name / book title,
and find selections, that authors of the era,
found particularly useful. ]

Other Books on Tobacco Effects
The Use and Abuse of Tobacco,
by Dr. John Lizars (1859)

Tobacco and Its Effects: Report
to the Wisconsin Board of Health

by G. F. Witter, M.D. (1881)
Click Here for Titles of Additional Books