Would you mind forwarding the information you mentioned in your above post. You can leave it here on the forum or email me directly at firstname.lastname@example.org.
I too saw that the Margaret Hamilton marriage was listed in the Wikipedia article. Unfortunately, Margaret isn't listed in the Peerage and there is no source given for that marriage in the Wikipedia article.
Just out of curiosity what is your Peden ancestry? I am a descendant of John Peden and Margaret McDill of South Carolina.