I Am Looking for Information Around the Adoption of My Grandmother Dawn Seymour Birth Certificate Marie Agnus Ashley to Robert Conrad Seymour 1876...

We know that nana was unofficially adopted at birth by Robert Conrad/Seymour, and then later official adopted. On her birth certificate her father is not named. It is believed that Marie Agnus (known as Dawn - my grandmother) may have been fathered by either Robert himself, or another member of the Conrad/Seymour family due the 'unofficial' adoption. It is our understanding that she was taken home from the hospital by Robert Conrad/Seymour and Bertha Blanche Conrad/Seymour. Nana's birth mother was Elaine Fanny Ashley. Any information would be much appreciated. Thanks