William Mumler and Lincoln's Ghost.

William Mumler was an American spirit photographer who worked in New York and Boston.

Infamous “spirit photographer” William Mumler supposedly has the ability to use photographic plates to capture images of spiritual beings.

His first spirit photograph was apparently an accident.

In the early 1860's, he developed a self-portrait that appeared to feature the ghost of his cousin who had been dead for 12 years.

Mumler's most famous photograph apparently shows Mary Todd Lincoln with the "ghost" of her deceased husband, Abraham Lincoln.

Also Abraham Lincoln's Ghost, otherwise known as The White House Ghost, is said to have haunted the White House since his death in 1865.

Eleanor Roosevelt, President Dwight Eisenhower's press secretary, James Hagerty, and Liz Carpenter, press secretary to First Lady Lady Bird Johnson, said they felt Lincoln's presence many times.

The former president's footsteps are also said to be heard in the hall outside the Lincoln Bedroom.

President Harry S. Truman's daughter said she heard a specter rapping at the door of the Lincoln Bedroom when she stayed there, and believed it was Lincoln.

First Lady Grace Coolidge said she saw the ghost of Lincoln standing at a window in the Yellow Oval Room staring out at the Potomac.

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