John Lambton, 1st Earl of Durham's signature.
Traced in Adobe Illustrator from https://books.google.ca/books?id=1tfcieoMMAMC&amp;pg=PA31&amp;lpg=PA31&amp;dq=lord+durham+canadian+portrait+gallery&amp;source=bl&amp;ots=qUAAhgdTLz&amp;sig=NHt7-Wd_j8YM60uHv6QLIGg9kts&amp;hl=en&amp;ei=FFX_SpydGdT5nAftp_GZCw&amp;sa=X&amp;oi=book_result&amp;ct=result&amp;resnum=1&amp;ved=0CAgQ6AEwAA#v=onepage&amp;q=&amp;f=false
John Lambton, 1st Earl of Durham