Conversation so far:
What were William H. Seward's views on diplomacy?
When the war started, William H. Seward turned his attention to making sure that foreign powers did not interfere in the conflict.
How did William H. Seward make sure foreign powers didn't interfere in the Civil War?
When the Confederacy announced that it would authorize privateers, William H. Seward sent word to American representatives that the U.S. would become party to the Paris Declaration Respecting Maritime Law.
What else did William H. Seward do in politics besides making sure foreign powers didn't interfere in the Civil War?
William H. Seward drafted a strong letter for the American Minister in London, Charles Francis Adams, to read to the Foreign Secretary, Lord Russell.
What were William H. Seward's views about the Civil War?
Seward did his best to stop the southern states from seceding; once that failed, he devoted himself wholeheartedly to the Union cause.

Question: What other important things did he do?
Self-contained rewrite: What other important things did William H. Seward do besides devoting himself wholeheartedly to the Union cause?