How did the characters in and then there were none die?

These were the main characters (aka the ones who were murdered)Vera Elizabeth Claythorne,

Lawrence John Wargrave (Justice Wargrave was his title),

Philip Lombard,

William Henry Blore,

Edward George Armstrong (Dr. Armstrong was his title),

Thomas Rogers,

Ethel Rogers,

Emily Caroline Brent,

Anthony James Marston,

John Gordon Macarthur (General Macarthur was his title).