The timing explains the cowboys.
Did you note the bit about the carcinogenic qualities of sassafras? Here’s more on the matter!
SPECIAL QUOTE:
“Oil of Sassafras is chiefly used for flavouring purposes, particularly to conceal the flavour of opium when given to children. In the United States of America it is employed for flavouring effervescing drinks.”
Because you know how hard it is to get the kids to take their opium!
Damned kids.