In bed, a few hours after being shot by the actor John Wilkes Booth at Ford's Theatre, Washington DC.
If you're asking whether it was a conspiracy, there are whole websites devoted to the subject.
Hugh Lincoln Cooper died in 1937.
Fred Lincoln died on 1940-01-14.
No- Lincoln died in the morning of the Saturday before Easter.
Typhoid Fever.
1809-1865
Yes
Mordecai Lincoln died in 1830.
Lincoln Clark died in 1886.
Lincoln Fitzell died in 1958.
Lincoln Dixon died in 1932.
Frances Lincoln died in 2001.
Lincoln Walsh died in 1971.
Philip Lincoln died in 1989.
Lincoln Hurring died in 1993.
Lincoln Holroyd died in 1961.
Lincoln Gordon died in 2009.
Charley Lincoln died in 1963.