"We Mourn Our Loss" 19th C. Pinback Button

Can anyone ID the photo on this antique turn of the century 1 ¼ inch celluloid photo button that originally had a black ribbon attached to it. Odd that there is no name to it ,must have been someone everyone was supposed to recognize at the time.Coincidentally but for the hairline the guy looks a lot like the first Dr. Who William Hartnell. Assuming an English heritage statesman or military figure. Back of the pin is stamped “CHICAGO PHOTO BUTTON” on the outer circle and also on the outer circle opposite direction “& BAD with about 4 more characters illegible. In the center is “PATD, MAY31, 98.”. Just found with a hoard of about a hundred pinbacks and medals and badges from the early 1900s to the 5os at a local yard sale.