Poison in his drink
Arthur Richmond died by way of a lethal injection from Dr. Armstrong, thus being the first victim on Soldier Island. His death was staged to look like a heart attack to initially deceive the other characters.
Barry Richmond died in 2002.
Kenneth Richmond died in 2006.
Mary Richmond died in 1928.
Sarah Richmond died in 1921.
Richmond Shreve died in 1946.
Richmond Manyweathers died in 1989.
Richmond Landon died in 1971.
Legh Richmond died in 1827.
Thomas Richmond died in 1874.
Bill Richmond died in 1829.
Earl Richmond died in 2001.