https://books.google.com/books?id=wq5DAQAAMAAJ&pg=PA1717&dq=anna+wharton+seward+and+frederick+seward+november+1854&hl=en&sa=X&ved=0ahUKEwjhkpWT3_zWAhUBhyYKHUVwArIQ6AEIQjAF#v=onepage&q=anna%20wharton%20seward%20and%20frederick%20seward%20november%201854&f=false Marriage date is also stated on page three of the book "The Civil War Diary of Gideon Welles..."