 The "political prisoners" affected included Baltimore newspaper editor, and vocal Lincoln critic, Frank Key Howard, who had been a co-prisoner with May, and was also a grand-nephew of Chief Justice Taney's wife Anne Key, (Francis Scott Key's sister).In 1862 Henry May and Ohio Congressman Clement Vallandigham, an anti-war Democrat, led an investigation into telegraphic censorship of the press instituted by Lincoln's Secretary of State William H. Seward in certain cities.He died in Baltimore, and is interred in Cathedral Cemetery.