A museum in Philadelphia plans to submit a sample of Abraham Lincoln's blood to scientific analysis in hopes of shedding light on the mysterious ailments that afflicted the 16th US president. The Grand Army of the Republic Museum's board unanimously approved "further investigation into the sciences, legacy and history of the artefact," its vice-president Andy Waskie said. The artefact is a piece of bloodstained pillow taken from the Peterson house where Mr Lincoln died in 1985 after being shot by an assassin in Fords Theatre in Washington, said Mr Waskie, a historian and professor at Temple University. Acting on the...