The Prologue, in which I mention the
time I discovered this secret, and what
gave rise to the desire I had of making
such a discovery, and why I did not wish
people to know that I had made it, as well
as my reasons for making use of smells,
&c., &c. 17
Poinsett’s Certificate--he then was Minister
Plenipotentiary of the United States of
America to Mexico. 26