Annexation fears can be found throughout Canadian History for Dummies, in which humourist Will Ferguson stated that for "John L. O'Sullivan, it was the "manifest destiny" of the United States to annex and possess all of North America".[19] In fact, O'Sullivan's use of the term never extended beyond potential American annexation of Texas and the Oregon Territory; he explicitly wrote that he did not believe that the United States had a destiny to annex Canada.[20]